Gu Ci

Biodata

Feature	Value
Name	Gu Ci (顾辞)
Alias(es)	Thunder Tiger; disguised as an ordinary four-ring Soul Ancestor in Martial Soul City 56 115
Gender	Male
Affiliation	Thunder Tiger Marquis Manor; Heaven Dou Royal Academy's Special Training Class; Heavenly Workshop; Heaven Dou Empire
Occupation/Role	Soul Master; Soul Tool developer; tournament champion; imperial intelligence agent
Status	Alive
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Innate Full Soul Power	3	His Mystic Thunder Tiger King evolves into the Super Martial Soul Thunder Prison Heaven-Slaying Tiger; he also awakens the Heavenly Eye as a second martial soul.
Level 18	14	Reaches this level after contracting his first Soul Spirit, Zi Dian, and receiving soul-power feedback.
Level 20	16	Absorbs the Purple Sky Thunder Orchid; his thunder attribute becomes Ultimate Thunder.
Level 25 / Two-Ring Soul Grand Master	21	Contracts the 18,000-year Dark Night Thunder Tiger, Night Shadow; possesses two rings totaling over 20,000 years.
Level 23	34	Continues concealing his real cultivation and rings while attending the academy.
Level 30 / Three-Ring Soul Elder	53–55	Contracts the 35,000-year Thunder Pattern Tiger Emperor and gains his third ring and third soul skill, Thunder Emperor's Wrath.
Level 39	59	Reaches the threshold of the fourth-ring breakthrough after two years of cultivation and Great Soul Arena combat.
Level 40 / Four-Ring Soul Ancestor	78	Breaks through at age nine with the aid of his Soul Spirits' temporary soul-power boost.
Fourth Soul Ring: 55,000 years	83	Contracts Silver Crown and gains Heavenly Execution, a defense-piercing single-target skill.
Level 45	94	Advances after months of cultivation, academy training, and work at the Heavenly Workshop.
Level 46	101	Breaks through after returning from the Cangyun Pass campaign.
Level 48	102	Reaches Level 48 while preparing for the Continental Advanced Soul Master Academy Elite Tournament.
Level 49	103	Encounters a mental bottleneck despite having sufficient soul power.
Level 50 / Five-Ring Soul King	108	Completes the Thunder God's First Trial by absorbing a God-Bestowed Spirit Ring.
Fifth Soul Ring: 99,000 years	108	Stops the God-Bestowed Ring's growth just short of 100,000 years; gains Thunder God's Wrath.
Level 51	112, 119	Advances naturally after the fifth-ring breakthrough and becomes an eleven-year-old Soul King.

Background

Gu Ci was born into the Gu family, whose hereditary martial soul is the Mystic Thunder Tiger, a powerful mutation passed down through his grandfather and father. His father, Thunder Tiger Marquis Gu Xiao, is a Soul Saint, while his mother, Li Wanyue, possesses an Eye-type Body Martial Soul. The Gu family's noble position is closely tied to Dugu Bo, who was the childhood friend of Gu Ci's late grandfather. 1 3

During his awakening, Gu Ci initially receives the Mystic Thunder Tiger King martial soul. That same night, a system's final gift allows the martial soul to evolve into the Thunder Prison Heaven-Slaying Tiger and grants him the Heavenly Eye as a second martial soul. The system leaves behind techniques concerning Soul Spirits, Soul Cores, and Soul Tools. 2 4

He uses this knowledge to help his family and allies: Li Wanyue's Eye Martial Soul evolves, Gu Xiao advances to Level 75, and Dugu Bo receives methods that help resolve the toxins accumulated by his Jade Scale Snake martial soul. 10 14

Appearance

Gu Ci is a young boy whose appearance is frequently disguised or understated to conceal his actual power. His most distinctive physical trait is the golden vertical eye that opens on his forehead when he uses the Heavenly Eye. 4

• A golden Heavenly Eye appears between his brows when activated. 4
• His Thunder Prison Heaven-Slaying Tiger gains faint golden features after he develops Ultimate Thunder. 16
• He possesses the External Soul Bone Purple Lightning Wings, which emerge from his back for high-speed movement. 20
• His right index finger bears the subtle golden Thunder God's Mark after receiving the divine inheritance. 90

Personality

Gu Ci is cautious, strategic, and unusually mature for his age. He repeatedly hides his cultivation, soul rings, martial souls, and combat abilities rather than seeking public recognition. Even when confronted by powerful figures such as Martial Soul Hall envoys, he remains composed and speaks with calculated restraint. 34 40 41 57

He treats Soul Beasts as potential partners rather than disposable resources. His Soul Spirit contracts are built through negotiation, mutual benefit, and respect; both Night Shadow and Silver Crown are persuaded by his willingness to address them as equals. 21 55 82

Despite his pragmatism, he is protective of those close to him and feels responsible for Heaven Dou's defense. He joins the border war to support Gu Xiao and uses his abilities in battle even at significant personal risk. 63 67 99

Abilities & Skills

Thunder Prison Heaven-Slaying Tiger

A Super Martial Soul evolved from the Mystic Thunder Tiger King. It grants Gu Ci exceptionally powerful thunder-based combat abilities and bloodline suppression against Thunder-attribute tiger Soul Beasts. 3 4 20 21

• Its thunder attribute evolves into Ultimate Thunder after Gu Ci absorbs the Purple Sky Thunder Orchid. 16
• Ultimate Thunder carries destructive power capable of blasting apart a distant boulder and leaves residual lightning energy. 16
• Its superior bloodline helps Gu Ci negotiate with Thunder-attribute Soul Beasts. 21 55
• Gu Ci often disguises it as an ordinary Thunder Tiger or Thunder Cat to avoid exposing his identity. 26 27 115

Heavenly Eye

Gu Ci's second martial soul is a spiritual-type Eye Body Martial Soul. It gives him exceptional perception and analysis. 4

• Sees internal conditions, martial soul energy flow, and material properties. 4 18
• Helps evaluate the limits of his body and the age of soul rings he can endure. 53
• Detects hidden threats and identifies battlefield terrain features, including a concealed route behind Cangyun Pass. 63 65
• Its perception range expands to fifty li after the fifth-ring breakthrough. 108
• Gu Ci avoids openly using it in many public battles to protect his secrets. 57

Ultimate Thunder

An evolved thunder power obtained through the Purple Sky Thunder Orchid. It tempers Gu Ci's body and greatly strengthens the destructive potential of his lightning. 16

• Reforges his meridians, flesh, and bones through lightning tempering. 16
• Enhances the power of his soul skills, including Thunder God's Wrath. 108
• Draws the attention of powerful figures, including the Purgatory Mighty Lion Douluo and Chrysanthemum and Ghost Douluo. 84 100

Thunder Emperor's Wrath

Gu Ci's third soul skill, gained from the 35,000-year Thunder Pattern Tiger Emperor. 55

• Condenses lightning into a tiger-shaped ranged attack.
• Deals devastating wide-area damage in front of Gu Ci. 55
• Was used at full force to devastate enemy ranks during the Cangyun Pass war. 70

Thunder Emperor's Dominant Body

A passive enhancement derived from the Thunder Emperor's Soul Ring. 55

• Uses lightning to protect Gu Ci's body.
• Greatly improves defense and recovery. 55

Thunder Emperor's Domain

A lightning domain centered on Gu Ci. 55

• Paralyzes enemies and impairs their speed and reactions.
• Doubles Gu Ci's speed within the domain. 55
• Covered roughly one hundred zhang during the Cangyun Pass battle. 70

Heavenly Execution

Gu Ci's fourth soul skill, gained from the 55,000-year Silver Crown. 83

• A single-target ultimate penetration attack that ignores physical defense. 83
• Destroys a ten-zhang-thick cliff face with one strike. 83
• Pierces a three-foot Test Stone designed to endure Soul Saint attacks. 92
• Qin Ming judges it capable of killing a Soul King; Gu Ci privately believes its full power could threaten a Soul Emperor. 92

Thunder God's Wrath

Gu Ci's fifth soul skill, granted by the 99,000-year God-Bestowed Spirit Ring. 108

• A large-scale attack with a range ten times greater than Thunder Emperor's Domain. 108
• Its strength depends on Gu Ci's Ultimate Thunder. 108
• Consumes the energy of the Thunder God's Heart rather than ordinary soul power. 108
• Cannot be used again until the Thunder God's Heart recovers. 108

Soul Spirit Contracts

Gu Ci applies the Soul Spirit Art to form cooperative contracts with Soul Beasts instead of killing them for conventional rings. 14 21 55

• Zi Dian / Purple Lightning — first Soul Spirit; a thunder-attribute companion associated with Gu Ci's mobility and Purple Lightning Wings. 14 20
• Night Shadow — 18,000-year Dark Night Thunder Tiger Soul Spirit with concealment capabilities. 21 23
• Thunder Emperor — 35,000-year Thunder Pattern Tiger Emperor Soul Spirit; provides Gu Ci's third-ring abilities. 55
• Silver Crown — 55,000-year Soul Spirit associated with his fourth ring and Heavenly Execution. 83

Soul Tool Crafting

Gu Ci possesses advanced Soul Tool knowledge and serves as the central technical figure behind the Heavenly Workshop. 23 46

• Creates First-Grade Soul Tools including Concealment Pendants, Storage Rings, and Soul Sword Blades. 24 46 47
• Identifies and corrects faults in higher-grade Soul Tool Core Arrays. 92
• Learns forging and core-array creation under Zhao Tieshan's guidance. 111
• Successfully produces a Fourth-Grade Soul Tool Core Array after more than three hundred failures. 112
• Creates a Fifth-Grade Soul Armor and leaves it with the Heavenly Workshop for study. 123

Equipment / Items

• Purple Lightning Wings — External Soul Bone that grants the skill Thunder Flash, allowing short-distance lightning-based teleportation. 20
• Storage Ring — crafted from remaining Void Stone. 24
• Concealment Pendants — Soul Tools that alter the apparent colors of soul rings; Gu Ci makes one for Dugu Yan. 24
• Soul Sword Blade — Soul Tool weapon developed through the Heavenly Workshop. 46 47
• Soul Power Recovery Crystals — used during the Cangyun Pass battle to replenish depleted soul power. 67
• Thunder Wings Right Leg Bone — ten-thousand-year soul bone awarded by Emperor Xue Ye after Gu Ci's tournament victory. 113

Relationships

• Gu Xiao — father and Thunder Tiger Marquis; supports Gu Ci's growth and fights beside him during the border war. 1 67
• Li Wanyue — mother; her Eye Martial Soul evolves through Gu Ci's assistance. 3 10
• Dugu Bo — elder, protector, mentor, and Gu family's longtime ally; repeatedly accompanies or secretly guards Gu Ci during dangerous expeditions. 18 54 77 80
• Dugu Yan — childhood companion and close partner; fights beside Gu Ci as the Thunder Ice Team's “Ice Flood Dragon.” 2 56 59
• Ye Lingling — close ally and support-type teammate; gives Gu Ci a Nine-Heart Begonia upon his return from the Star Dou Great Forest. 53 54 85
• Qian Renxue — mutual interest, distrust, and later a promise to meet again after becoming stronger. 43 52 106 113
• Qin Ming — academy instructor who oversees Gu Ci's special training and recognizes his extraordinary potential. 36 92
• Yu Tianheng — teammate and friendly rival; respects Gu Ci's strength while striving to close their widening gap. 36 109
• Zhao Tieshan — Heavenly Workshop mentor who teaches Gu Ci forging and Soul Tool core-array production. 46 111
• Qian Sihai — Heavenly Workshop collaborator who works with Gu Ci on Soul Tool development and manufacturing. 46 92
• Thunder God — divine inheritor and guide; chooses Gu Ci as his successor and sets trials for him. 89 91

Story Role / Major Arcs

Martial Soul Awakening and Early Growth

Gu Ci's martial soul evolves into the Thunder Prison Heaven-Slaying Tiger, and he awakens the Heavenly Eye as a second martial soul. He gains access to the departing system's Soul Spirit, Soul Core, and Soul Tool knowledge, then uses it to strengthen his family and help resolve Dugu Bo's toxin problem. 2 4 10 14

Soul Spirit Contracts and Heavenly Workshop

He contracts Zi Dian, Night Shadow, and Thunder Emperor through agreements rather than hunting them conventionally. In parallel, he establishes himself as the driving force behind the Heavenly Workshop's Soul Tool research and production. 14 21 23 24 55

Great Soul Arena and Border War

Under the alias Thunder Tiger, Gu Ci and Dugu Yan form the Thunder Ice Team and rise from the Bronze Group to the Diamond Group. His accumulated combat experience prepares him for the Cangyun Pass conflict, where he fights Star Luo forces alongside Gu Xiao, Dugu Bo, and his Soul Spirits. 56 59 67 70 73

Fourth Ring and Divine Inheritance

Gu Ci independently enters the Star Dou Great Forest, contracts Silver Crown, and becomes a four-ring Soul Ancestor at age nine. Soon afterward, the Thunder God chooses him as a successor, grants the Thunder God's Mark, and assigns him the First Trial: reach Level 50 within three years. 78 83 89 91

Fifth Ring and Tournament

After overcoming his Level 49 bottleneck, Gu Ci absorbs a God-Bestowed Spirit Ring that reaches 99,000 years and becomes a five-ring Soul King. He later leads his team to victory in the Continental Advanced Soul Master Academy Elite Tournament. 103 108 112 113

Imperial Service and Martial Soul City Mission

Following the tournament, Emperor Xue Ye appoints Gu Ci an Honorary Academician, makes him the Crown Prince's study companion, and sends him to Martial Soul City to gather intelligence. Gu Ci infiltrates the city while disguised as an ordinary four-ring Soul Ancestor, gathers information on Martial Soul Hall, and acquires materials for the Thunder God's Second Trial. 113 115

Trivia

• Gu Ci publicly claimed to possess Level 8 Innate Soul Power and an ordinary Mystic Thunder Tiger martial soul when enrolling at the academy, concealing his actual awakened state. 26 27
• At age nine, he became a four-ring Soul Ancestor with a 55,000-year fourth ring, a feat Qin Ming had never encountered before. 83 91
• His five Soul Spirits and extreme ring configuration are concealed whenever possible, including during his infiltration of Martial Soul City. 115
• The Thunder God's Second Trial requires him to gather materials from five Soul Beasts over 50,000 years old and forge a Fifth-Grade Soul Tool within three years. 110 115