Du Busi

Biodata

Feature	Details
Name	Xu Qing 2 3
Alias	Demon King 10 33
Species	Human 2 3
Gender	Male 2 3
Affiliation	Body Sect (Young Sect Master) 3 4; Sun Moon Imperial Soul Engineer Academy (student) 20 24
Status	Alive 38 39 40 41
First Appearance	Chapter 2 2

Physical Description

Xu Qing is a strikingly handsome young man with a lean, athletic build that belies his immense physical strength. He appears to be in his mid-teens, with a tall frame and well-defined musculature developed through the rigorous training of the Body Sect. His complexion is often described as unhealthily pale, which contrasts with his jet-black hair and gives him an almost ethereal quality. His movements can appear sluggish and his expression dull, yet when engaged in combat, his eyes ignite with an intense golden light, and his body radiates a commanding presence. He typically wears simple clothing suitable for travel or battle, often with his long black hair tied back by a ribbon.

• Hair: Long, straight black hair, usually tied back with a simple ribbon.
• Eyes: Black in their resting state; when activating his soul skills or channeling holy light, his left eye (and occasionally both) glows a brilliant gold.
• Build: Tall and lean, with a powerfully athletic physique that is both fluid and densely muscled. His musculature becomes more pronounced when using the Body Sect's secret techniques.
• Complexion: Notable pale, sometimes described as unhealthily so, though this does not detract from his handsomeness.
• Distinctive Marks: When using the Blood Burst technique, faint blood-red patterns emerge across his skin, and his muscles swell while retaining their natural lines.
• Expression: Often wears a blank, indifferent look that can seem dull or disinterested, though he is capable of sudden shifts in demeanor. His default expression is one of nonchalance.

Personality

Xu Qing’s personality is a blend of calculated ambition, playful irreverence, and fierce loyalty, balanced by a pragmatic ruthlessness when pursuing his goals. He is supremely confident in his abilities and his unique path, willing to take significant risks to push his limits 39. Beneath a nonchalant and even lazy exterior, Xu Qing is a sharp strategist who manipulates situations and people to his advantage, yet he remains protective of his friends and mentors, showing a deep sense of loyalty. He can be cavalier and teasing with those close to him, but knows when to adopt the proper solemnity for formal occasions.

• Ambitious and Confident – Xu Qing has unwavering faith in his own strength and his chosen path, often showing off his power and seeking to transcend his limits. He actively pursues growth, whether by risking his life to absorb a 100,000-year soul ring or by desiring strong opponents like the Sword Fanatic 7 39 13.
• Strategic and Cunning – He rarely acts without a plan, often forming backup contingencies and using his intellect to outmaneuver others. When his first approach fails, he adapts instantly—such as when he switched to the Life Carving Knife to forcibly absorb the Titan Snow Demon’s soul ring 6 41 21.
• Manipulative – Xu Qing frequently uses psychological tactics to control those around him, exploiting greed, fear, or curiosity. He manipulates the Sky Dream Ice Silkworm with Mystic Ice Marrow to extract a soul sacrifice, and he hints at knowledge of Snow Empress to pressure Ice Empress 5 21.
• Protective and Loyal – He shows genuine care for his friends, such as worrying about Meng Hongchen’s well-being and preventing Xiao Hongchen from overdrawing his potential with a harmful pill. His loyalty extends to his master Du Busi, with whom he shares a teasing but deeply respectful bond 11 21 38.
• Playful and Nonchalant – Xu Qing often adopts a laid-back, even bored demeanor in everyday situations, falling asleep in class or dyeing a finished soul tool black just to annoy his partner. He jokes with his master and enjoys the finer things in life, like being “showered with cash” 11 24 30.
• Determined and Adaptable – When faced with failure or unexpected events, Xu Qing quickly shifts gears without hesitation. He remains composed under pressure, whether by calmly switching to a backup plan during a soul ring absorption or by smoothly integrating into the Royal Academy despite changes in the political landscape 20 41.

Background

Xu Qing was the young sect master of the Body Sect, a disciple personally trained by the Limit Douluo Poison Undying—also known as Du Busi, the sect master who harbored a long-standing grudge against Shrek Academy and its Sea God Pavilion 3 5. From a young age, Xu Qing exhibited inexplicable prophetic dreams that allowed him to foresee future events; for instance, he knew precisely when Dai Yuhao (the boy who would later be renamed Huo Yuhao) would enter the Star Dou Great Forest with members of the Tang Sect 1. This prescience, which Poison Undying dismissed as ridiculous yet could not deny, shaped many of Xu Qing's decisions and placed him at the center of key developments. His martial soul was a unique dual configuration: a body martial soul named "Self" that transcended ordinary physical limits, and a spiritual-type martial soul that gave him extraordinary mental powers 3 4.

Xu Qing's first major breakthrough came when he accompanied Poison Undying to the Star Dou Forest in search of Huo Yuhao, who had just killed a Wind Baboon for his first spirit ring 2. There, Poison Undying subdued the million-year Sky Dream Ice Silkworm with a single strike, and Xu Qing later interrogated the worm inside his own spiritual sea, exploiting its gluttonous nature by revealing a piece of Ten-Thousand-Year Mystic Ice Marrow 4 5. The Ice Silkworm, unable to resist the temptation, willingly performed a soul sacrifice—a rare voluntary offering that gave Xu Qing four powerful soul skills: "Go All Out," "Spirit Armor," "Adaptation," and "Willpower" 7. This sacrifice instantly boosted his cultivation from level 35 to Soul Ancestor (level 40), and his first soul skill was later revealed to possess at least a four-fold power amplification 7 9. Following this, Xu Qing tested his newfound strength in a fistfight with Poison Undying, demonstrating that he could now stand in midair and match his master's physical blows 7.

Over the following months, Xu Qing continued to train relentlessly, honing his physical body as a weapon. He fought multiple Bone Dragons in a series of intense battles that lasted days, discovering that his body could consume vast amounts of soul power when used offensively 15. He also began to show a rebellious streak, often disregarding Poison Undying's warnings and lectures, though the master-disciple bond remained strong 15. Poison Undying, however, had greater plans for his disciple. He decided to send Xu Qing to the Sun Moon Empire to enroll in the Sun Moon Imperial Soul Engineer Academy under the guise of a student with an ice-attribute martial soul, using the Mystic Ice Marrow as his cover identity 20. This was part of a long-term strategy to give the Body Sect a foothold in the empire's most prestigious institution, and Xu Qing's adaptability allowed him to navigate the unexpected cancellation of the Body Academy plan and the revelation of Meng Hongchen's martial soul mutation 20 21. At the academy, he continued to study soul tool theory—with the help of Elder Yi, a demigod-level consciousness residing in his spiritual sea, who could read entire libraries with his divine sense—while also engaging in covert operations against the Holy Spirit Cult 31.

Xu Qing's powers expanded further when he undertook a dangerous expedition to the Far North to hunt a Titan Snow Demon. Using his Mystic Ice Marrow as bait, he lured the beast into consuming a massive piece, driving it mad with greed 39. He then planned to help the Titan Snow Demon break through to 100,000 years of cultivation so that it could undergo a heavenly tribulation, after which he intended to absorb its soul ring 39. Despite the immense risk, Poison Undying agreed to withstand the heavenly tribulation while Xu Qing attempted to control the beast's spirit for a voluntary sacrifice 41. When the Titan Snow Demon's spirit proved too strong and unwilling to submit, Xu Qing switched to a backup plan: he used the Life Carving Knife to forcibly absorb the 100,000-year soul ring through a violent and painful process, ultimately succeeding 41. This act of determination and brutality underscored Xu Qing's relentless drive for power, a trait that defined his rise from a cunning young sect heir to a force capable of challenging even the ancient soul beasts of the Far North.

Abilities & Powers

Self Martial Soul – Body Martial Soul

Xu Qing’s primary martial soul is “Self,” a god-level body martial soul that manifests as a silver humanoid form behind him. This martial soul defines his entire combat style, granting innate traits that scale with his conviction and physical conditioning. The Self martial soul is not merely an external projection; it serves as the conduit for his soul skills and directly enhances his physical capabilities. Its existence allows Xu Qing to treat his own body as the ultimate weapon, bypassing the need for external tools or traditional weapon-based martial souls 4 7.

• Applications: The Self martial soul enables Xu Qing to execute powerful physical strikes, such as his “Mountain Mover” and “River Breaker” punches, which can shatter soul skills and defenses 27. It also anchors his soul skills, allowing him to activate “Go All Out” for a tenfold power increase 7. The martial soul’s silver form can be used to intimidate opponents and project an aura of absolute strength 3 7.
• Limitations: The Self martial soul consumes massive amounts of soul power when used aggressively, especially for sustained combat or high-amplification techniques. Without proper soul rings, its innate traits alone are insufficient against high-level opponents. Xu Qing cannot yet use both martial souls simultaneously, limiting his tactical flexibility in prolonged battles 9.

Mystic Ice Marrow Martial Soul

Xu Qing’s second martial soul, Mystic Ice Marrow, is a spiritual-type ice-attribute martial soul that allows him to generate, manipulate, and absorb Mystic Ice Marrow—a concentrated form of ice essence. This martial soul is closely tied to his plans to absorb Titan Snow Demon soul rings and pursue the legendary Ice God’s inheritance. The Mystic Ice Marrow serves both as a cultivation resource and a combat tool, capable of luring soul beasts and boosting his own soul power 38 39 44.

• Applications: Xu Qing can produce high-purity Mystic Ice Marrow to lure soul beasts like Titan Snow Demons, exploiting their greed to manipulate their behavior 39. He can integrate Mystic Ice Marrow into his Sea of Consciousness, storing hundreds of pieces for later use, and consume it to instantly double his soul power level or accelerate perception and bodily control 44. During combat, he can manifest a dragon phantom infused with ice marrow to attack enemies 25.
• Limitations: The Mystic Ice Marrow martial soul is primarily supportive and lacks direct offensive power unless combined with other abilities. Overconsumption of ice marrow can strain his body, and the process of integrating it into his Sea of Consciousness requires careful control. The martial soul’s effectiveness is tied to the availability of high-purity ice marrow, which must be produced or harvested 38 44.

Million-Year Soul Skills – Go All Out, Spirit Armor, Adaptation, Willpower

Following the sacrifice of the million-year Sky Dream Ice Silkworm, Xu Qing gained four powerful soul skills attached to his first soul ring. These skills are divided into one active and three passive abilities, each enhancing different aspects of his combat potential. The active skill “Go All Out” provides a temporary tenfold boost to his Self martial soul’s power, while the passive skills fortify his mental defenses, physical adaptability, and sheer willpower 7.

• Applications: “Go All Out” allows Xu Qing to instantly amplify his physical strength and soul power output, enabling him to shatter defenses and overwhelm enemies with brute force. It also grants a 100% chance to manifest a soul beast phantom, which he can mentally simulate for varied tactical options 7 35. “Spirit Armor” greatly enhances his mental power, making him immune to all mental soul skills below level 100 and granting one immunity to mental attacks above that threshold 7. “Adaptation” increases his body’s ability to adjust to new environments, injuries, and combat conditions. “Willpower” strengthens his resolve, allowing him to push through pain and exhaustion 7.
• Limitations: “Go All Out” consumes soul power at a massive rate; once soul power is depleted, the skill drains physical stamina and then willpower, risking incapacitation 7. The passive skills, while always active, provide only incremental benefits and cannot be consciously amplified. Overreliance on the tenfold boost can lead to reckless behavior and rapid fatigue.

Soul Beast Phantoms

A unique application of the “Go All Out” soul skill, Xu Qing can manifest powerful soul beast phantoms in battle. These phantoms are not mere illusions but possess substantial physical force and can be tailored to counter specific enemies. He has demonstrated phantoms of a Golden Dragon, Deep Sea Demon Whale, Golden Crocodile King, and Ice Jade Empress Scorpion, each capable of devastating attacks 26 35 40.

• Applications: Xu Qing uses soul beast phantoms to overwhelm opponents with overwhelming force, as seen when his Ice Jade Empress Scorpion phantom defeated an 88,000-year Titan Snow Demon in a single strike 40. The phantoms can be directed at multiple enemies, as when his Golden Crocodile King decimated evil Soul Ancestors 35. He can also use them defensively, creating barriers to protect allies 35.
• Limitations: Manifesting phantoms requires the activation of “Go All Out,” which is costly in soul power. The phantoms are temporary and cannot persist for extended periods. Xu Qing must have mental familiarity with the soul beast’s form and abilities to create an effective phantom; his success depends on his prior study or interaction with the beast.

Physical Prowess and Body Sect Techniques

Xu Qing’s physical abilities are extraordinary, even by Soul Master standards, thanks to his body martial soul and intense training. He can shatter ice spikes, leap great distances, and deliver punches that crack metal floors. His self-created Body Sect secret technique “Blood Burst” further amplifies his physical output by controlling his heart rate to exceed five hundred beats per minute, covering his skin with blood-colored patterns and swelling his muscles without sacrificing fluidity 27 39 40.

• Applications: Xu Qing’s raw strength allows him to engage high-level soul beasts in melee combat, breaking their attacks with his fists 39. “Blood Burst” enhances his punches to the point where he can withstand and counter the sword strikes of a Level 67 Battle Soul Emperor 27. His physical endurance lets him fight for days against multiple Bone Dragons 15. He also uses a level 6 soul tool glove made from the Sky Dream Ice Silkworm’s skin, which provides additional defense and offensive capability 15.
• Limitations: “Blood Burst” is a risky technique that strains his cardiovascular system; prolonged use can lead to internal damage. His physical combat style is most effective at close range, leaving him vulnerable to ranged or area-of-effect attacks. The soul tool glove, while durable, is not indestructible and may degrade over time 15.

Undying Trait

The Self martial soul’s innate trait “Undying” grants Xu Qing a form of resilience tied to his conviction. The description states, “Your conviction will lead you back to your peak!!”, implying that as long as he maintains his will, he can recover from severe injuries or setbacks 4. This trait has been observed in his ability to continue fighting despite taking heavy damage, such as during the battle with Ji Juechen 27.

• Applications: Xu Qing can withstand blows that would cripple ordinary Soul Masters and quickly regain his fighting form. This trait also bolsters his endurance, allowing him to push through pain and exhaustion when his conviction is strong 4 27.
• Limitations: The trait is passive and dependent on mental state; if his conviction wavers or he is overwhelmed psychologically, the recovery effect may diminish. It does not grant instant regeneration and likely requires time and soul power to fully restore his peak condition.

Mental Power and Spiritual Abilities

Xu Qing’s mental power is exceptionally developed, enhanced further by the “Spirit Armor” passive skill. He can sense foreign presences in his spiritual sea, interrogate soul beasts within his consciousness, and even use his mental power to support his movements (e.g., propelling himself in the air). His Sea of Consciousness houses Elder Yi, a demigod-level being who can protect him and help process residual souls 4 39 41. He can also integrate Mystic Ice Marrow into his Sea of Consciousness for storage and rapid consumption 44.

• Applications: Xu Qing uses his mental power to detect hidden threats, such as the Sky Dream Ice Silkworm within Huo Yuhao’s spiritual sea 4. He can mentally simulate soul beast phantoms for his “Go All Out” skill. During soul ring absorption, he relies on Elder Yi’s divine sense to digest the soul beast’s residual spirit and guide vitality 41. His enhanced mental power also grants immunity to most mental soul skills 7.
• Limitations: While his mental defenses are strong, they are not absolute; attacks from beings above level 100 can still affect him once per instance 7. Overusing his mental power for external tasks, such as moving objects or scanning large areas, can cause fatigue. Elder Yi’s assistance is not always available, as the old man may be occupied or choose not to intervene.

Power Progression

Stage	Level	Description
Limit Douluo	99	A level 99 Limit Douluo with nine spirit rings (three red), whose terrifying pressure dominates a hundred-mile radius and can easily withstand a 100,000-year heavenly tribulation while exhibiting immense spatial power. 2 41 38 39

Relationships

• Xiao Meng (Meng Hongchen)
  Xiao Meng is Xu Qing’s closest companion in the Sun Moon Empire. She dotes on him openly, gifting him a luxurious house in Ming Capital and enrolling him in the Sun Moon Imperial Soul Engineer Academy 24. She is possessive and jealous, immediately clashing with Ice Empress (whom she calls “Xiao Bing”) upon discovering her in Xu Qing’s room, physically shielding him and accusing her of ambushing him 23. Xiao Meng craves Xu Qing’s Mystic Ice Marrow, suffering withdrawal symptoms when deprived 13. She teases him constantly, whispers in his ear about her brother’s schemes, and tries to claim the seat next to him in class 30 31. Xu Qing reciprocates with calm, affectionate gestures such as making her popsicles and giving her his purest Mystic Ice Marrow, though he views their bond as “a boat of friendship” and tries to maintain distance 21 23 12. Xiao Meng is bold, confident, and scheming; she deliberately manipulated her grandfather’s plans to bring Xu Qing to Sun Moon so he could help the academy win the tournament 21 23.

• Xiao Hongchen
  Xiao Hongchen, Xiao Meng’s older brother, is a chuunibyou soul engineer who sees Xu Qing as both a rival and a kindred spirit. He constantly challenges Xu Qing to duels, fantasizing about defeating him to regain his sister’s admiration 10 31. Despite his arrogance, he respects Xu Qing’s strength and skill, calling him “my best friend” and trying to befriend him 30. Xu Qing tolerates his dramatics but humbles him when necessary, once preventing him from burning out his potential by stopping him from taking a harmful pill 11. They work together on soul tool crafting; Xu Qing assists Xiao Hongchen in forging a Level 6 glove and even dyes it black, much to Xiao Hongchen’s dismay 11. Xiao Hongchen also gifts Xu Qing’s Mystic Ice Marrow to his sister, acknowledging its value 13. Their dynamic is a mix of mutual respect, rivalry, and occasional teasing.

• Ice Empress
  Ice Empress is Xu Qing’s martial soul, the spirit of an Ultimate Ice scorpion. Their relationship is tense and hostile; Ice Empress resents Xu Qing for sealing her and controlling her power 20. She is defiant and protective of her own kind, blaming humans for Snow Empress’s disappearance 21. Xu Qing manipulates her by hinting at knowledge of Snow Empress’s whereabouts, using it as leverage 21. Over time, a grudging partnership develops: Xu Qing provides her Mystic Ice Marrow to evolve her seal, and she reluctantly cooperates 23 30. She clashes violently with Xiao Meng, feeling threatened by the human girl’s closeness to Xu Qing 23. Xu Qing nicknames her “Xiao Bing” to avoid chuunibyou connotations, treating her as a separate entity he must manage 24. Ice Empress is proud, ancient, and unused to subservience, but she grows accustomed to Xu Qing’s demands.

• Poison Undying (Du Busi)
  Poison Undying is Xu Qing’s master and the leader of the Body Sect. He dotes on Xu Qing, openly calling him his “precious disciple” and trusting his judgment implicitly 3 9 39. He makes all major decisions for Xu Qing’s benefit, such as arranging his enrollment in Sun Moon and cancelling the Body Academy plan 20. Their bond is affectionate and teasing: Xu Qing once suggested his master call him “Brother Xu,” earning a flick on the head 4. Poison Undying comforts Xu Qing when he is exhausted and treats all Body Sect children with rough paternal care 8. He allows Xu Qing great freedom, only intervening when necessary, and supports even reckless plans like luring the Titan Snow Demon 39.

• Jing Hongchen
  Jing Hongchen, Hall Master of Mingde Hall, is a pragmatic ally and a manipulative figure. He respects Xu Qing’s talents and works with Poison Undying to integrate Xu Qing into the Sun Moon competition team, despite it being impractical 13. He uses Xu Qing to strengthen ties between Mingde Hall and the Body Sect, and even prints Xu Qing’s name on potion packaging 13. Xu Qing is wary of him, recognizing his manipulations—Jing Hongchen leaks information to secure Xu Qing’s involvement in the academy 21. Nonetheless, they maintain mutual respect; Jing Hongchen prepares medicinal meals for Xu Qing and shows concern for his well-being 12.

• Huo Yuhao
  Huo Yuhao is a younger disciple of the Body Sect, taken in by Poison Undying after discovering his Body Martial Soul. Xu Qing treats him with a mix of harsh mentorship and underlying concern. He slaps him to wake him from despair, speaks coldly to toughen him up, but ultimately shows he cares by checking on him 8. Huo Yuhao envies Xu Qing’s twin martial souls and refers to him as “Brother Xu” 4. Their relationship is that of senior to junior; Xu Qing is aloof but protective, while Huo Yuhao looks up to him.

• Juzi
  Juzi is a student at the Sun Moon Imperial Soul Engineer Academy who has a brief, frustrated interaction with Xu Qing. She throws an orange at him in the library, but he catches it and squeezes it into juice, treating her attack as food. This enrages her, and she is left resentful 31. There is no deeper relationship; it is a one-sided antagonism.

• Dean Lin Jiayi
  Lin Jiayi, the Dean of Academic Affairs, meets Xu Qing during his entrance and exempts him from the test due to special arrangements, showing admiration for his potential 24. He later personally teaches Xu Qing’s class, emphasizing the importance of the selection trial 30. Their relationship is professional and respectful.

• Elder Yi
  Elder Yi is a remnant consciousness residing in Xu Qing’s Life Carving Knife, gifted to him by Xu Qing 8. They communicate mentally; Elder Yi helps Xu Qing understand soul guidance concepts, and Xu Qing gives him the knife as a home 31 8. Elder Yi is polite and grateful, and Xu Qing treats him kindly.

• Ice Empress and Xiao Meng
  These two have an immediate, hostile rivalry. Xiao Meng intrudes on Xu Qing’s room and finds Ice Empress, accusing her of ambushing Xu Qing. Ice Empress is equally confused and defensive 23. They clash over Xu Qing’s attention, with Xiao Meng viewing Ice Empress as a rival and Ice Empress feeling threatened by the human girl 23 30.

• Xiao Meng and Xiao Hongchen
  Sibling relationship marked by teasing and protectiveness. Xiao Meng is annoyed by her brother’s chuunibyou antics and fangirls, and she competes with him for Xu Qing’s companionship 13 30. Xiao Hongchen is proud of his sister but jealous of her closeness to Xu Qing; he wants to defeat Xu Qing to regain her admiration 31. Despite this, they care for each other—Xiao Hongchen gives her Mystic Ice Marrow from Xu Qing, and she teases him affectionately 13.

Trivia

1. Huo Yuhao's first spirit ring was only ten years, obtained from a Wind Baboon he killed himself. 2
2. Huo Yuhao wet his pants upon seeing the million-year Sky Dream Ice Silkworm. 2
3. Xu Qing's second martial soul is called "Self," a Body Martial Soul. 3
4. Poison Undying calls Huo Yuhao's eyes "beautiful" and recognizes his Body Martial Soul. 2
5. Xu Qing's million-year soul skill from the Sky Dream Ice Silkworm sacrifice doubled his base strength. 7
6. Huo Yuhao withstood nine injections of Nine Dragon Power on his first try, surpassing Long Aotian's record of seven. 7
7. The Body Sect's training ground features mountain faces studded with steel spikes for "solo climbing." 9
8. Huo Yuhao's head is naturally pointy, which makes him self-conscious. 29
9. Ano's arms are thicker than Huo Yuhao's thighs. 29
10. Xu Qing plans to use Mystic Ice Marrow to lure a Titan Snow Demon and help it break through to 100,000 years. 39
11. Du Busi grants Xu Qing 30% control of the soul core seal on the Ice Jade Empress Scorpion. 39
12. Xu Qing summons the Ice Jade Empress Scorpion to defeat the Titan Snow Demon in a single strike. 40
13. Xu Qing uses the Life Carving Knife to forcibly absorb the Titan Snow Demon's 100,000-year soul ring. 41
14. Xu Qing kicks the Sky Dream Ice Silkworm's soft body, commenting it's more comfortable than his sandbags. 2
15. Xiao Hongchen has chuunibyou tendencies, declaring Xu Qing his "best friend" and acting dramatically in class. 30
16. Xiao Hongchen dyes his hair with colorful streaks. 30
17. Xu Qing is only 11 years old but skips grades to the fifth grade, where the average age is 14–16. 30
18. Juzi throws an orange at Xu Qing, who catches it and squeezes it for juice with his bare hands. 31
19. Meng Hongchen offers to craft a soul tool for Xu Qing and seems to know an unusual amount about him. 10
20. Xu Qing's past life knowledge includes veterinary drugs and intellectual property rights. 9
21. After Huo Yuhao suffers a fortune backlash, his soul power refinement speed increases by half. 8
22. Xu Qing meets Electrolux, a remnant consciousness, and gifts him the Life Carving Knife. 8
23. Poison Undying wipes Huo Yuhao's tears with a soul power-covered palm to comfort him. 8
24. Dean Lin Jiayi exempts Xu Qing from the entrance test due to special arrangements. 24
25. Xiao Meng experiences withdrawal symptoms from lack of Xu Qing's Mystic Ice Marrow. 13