Lei Xiao

Biodata

Feature	Details
Name	Lei Xiao (雷霄)
Alias(es)	Fourth Brother; Little Fourth; Little Four 2 3 6
Species/Race	Innate lifeform; initially lower-grade, later elevated to middle-grade 3 7
Gender	Male
Affiliation	Personal disciple of Tongtian 15
Occupation/Role	Cultivator; wielder of thunder-based Heavenly Dao authority
Status	Active; cultivating in Thunder Pool with the three thunder wyverns 47
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Early-stage Mystic Immortal	1	Took human form on Three Immortal Isles after borrowing the Three Xiao's power; possessed cultivation but little practical foundation.
Early-stage Golden Immortal	3	Recovered from the backlash of forcibly wielding Purple Firmament Origin Divine Thunder; Yun Xiao's treatment also raised him an entire major realm.
Middle-stage Golden Immortal	7	Advanced after the Dragon-Phoenix Battlefield illusion and the absorption of its thunder source; his innate grade also rose to middle-grade.
Late-stage Golden Immortal	13	Broke through during seclusion while refining gains from Tang Valley.
Perfected Golden Immortal	32	Reached perfection after comprehending transformations of the Lightning Dao through King of the East's lecture and refining a Ginseng Fruit.

Background

Lei Xiao is a transmigrator from future Blue Star who awakened on the Three Immortal Isles with both his prior-life memories and the inherited memories of the Purple Firmament Origin Divine Thunder. He took human form through power connected to the Three Xiao, creating a partial karmic bond with them; he therefore introduced himself as their younger brother. At the time, he was only an early-stage Mystic Immortal and sought the sisters' protection in the dangerous Primordial World. 1

When sea-clan cultivators attacked the isles, Lei Xiao forcibly invoked Purple Firmament Origin Divine Thunder to protect the Three Xiao. The attack severely injured the invading Golden Immortals of Great Unity, killed their horned leader, and drove the surviving attackers away, but left Lei Xiao drained and unconscious. 2 After five thousand years, he emerged from seclusion fully recovered and at the early Golden Immortal realm, then left the isles with Bi Xiao to seek opportunities rather than rely solely on slow secluded cultivation. 3

Appearance

Lei Xiao is a tall, refined young man with a steady temperament. He wears a Daoist robe patterned with dark-purple lightning, while a lightning mark rests between his brows. 1

• The brow mark turns purple when he invokes Purple Firmament Origin Divine Thunder. 2
• His eyes can emit purple lightning after refining thunder sources. 45
• Refining thunder power into his body left faint purple Dao-patterns flowing beneath his skin. 45

Personality

Lei Xiao is cautious, practical, and highly aware of the Primordial World's unequal power structure. He avoids needless provocations, limits the use of his divine sense around unknown experts, and deliberately avoids entanglement with King of the East's ambitions. 4 8 He nevertheless accepts calculated risks when his family is endangered or when an opportunity is essential to his advancement. 2 6 23

He is deeply protective of the Three Xiao, repeatedly placing himself between them and stronger enemies. He urged Tongtian to rescue Yun Xiao and Qiong Xiao, safeguarded Qiong Xiao while she refined Phoenix Divine Fire, and gave Yun Xiao his artifact materials so she could obtain a protective treasure. 16 23 34 His compassion also extends to Linglong, whom he promised to rescue from Wind Abyss despite refusing to exploit her desire for freedom for a spirit treasure. 38

Abilities & Skills

Purple Firmament Origin Divine Thunder

Lei Xiao's inherited thunder origin is both his core power and his connection to the Heavenly Dao. It grants extreme destructive force, resistance to hostile energies, and the potential to improve his innate foundation through fusion. 1 7

• Repelled the attack on Three Immortal Isles and killed the horned leader of the invading force. 2
• Resisted the Dragon-Phoenix Battlefield's illusion and allowed him to control the five-clawed golden dragon projection. 5 6
• Suppresses Innate Baleful Qi, though purging it too forcefully can endanger the afflicted person's body. 22
• Its use can exhaust his essence, energy, and spirit, leaving him unconscious and dependent on protection. 3
• Refining thunder sources improves its fusion progress and raises Lei Xiao's innate foundation. 7 45

Eye of Heavenly Retribution

Granted after Lei Xiao provoked the Fire Demon God into exposing its Chaos aura and stirred the Eye of the Heavenly Dao, this vertical eye contains Heavenly Dao will and specializes in karma, falsehood, tribulation, and thunder. 11 16

• Senses concealed gazes and greatly sharpens Lei Xiao's perception. 14
• Tracks karmic links; after Lei Xiao completed the first turn of the Nine-Turn Primordial Essence Art, it located Yun Xiao and Qiong Xiao. 16 17
• Sees through falsehood and guided Lei Xiao through the lethal astral winds of Wind Abyss. 16 36
• Devoured a silver-white thunder snake and helped him refine its immense thunder origin. 44
• Initially could not fully open because Lei Xiao's Primordial Spirit was too weak to bear its power. 16

Heavenly Tribulation Authority

Lei Xiao gained authority over heavenly tribulations after his encounter with the thunder wyrms and Eastern Emperor Taiyi. While a nearby being undergoes tribulation, he can command its tribulation power and borrow the Heavenly Dao's strength. 46 47

• Dissipated Eastern Emperor Taiyi's golden hand with a Heavenly Dao-empowered lightning strike. 46
• Injured Eastern Emperor Taiyi and killed a Demon Race Primordial Unity Golden Immortal during his escape. 46
• Can temporarily contend with far stronger opponents while empowered by the Heavenly Dao. 47
• Requires a living being nearby to be undergoing heavenly tribulation. 47

Nine-Turn Primordial Essence Art

Tongtian gave Lei Xiao the complete Nine-Turn Primordial Essence Art, a Primordial Spirit cultivation method whose ninth turn is said to permit attainment of the Dao. 15

• Completion of the first turn substantially strengthened his Primordial Spirit. 17
• Its Primordial Spirit enhancement enabled his initial activation of the Eye of Heavenly Retribution. 17
• Tongtian considers Lei Xiao to have found his own Dao despite his initially weaker innate foundation. 15

Thunder-Refined Body

Lei Xiao can absorb and refine thunder lifeforms, converting their power into reserves within his body. 41 44

• Thunder Marsh naturally accelerates his Purple Firmament Origin Divine Thunder fusion by more than tenfold. 41
• He opened 12,000 cellular spaces to store refined thunder-source fluid. 45
• Releasing his stored thunder power can rival a full-force strike from a late-stage Primordial Unity Golden Immortal. 45

Equipment / Weapons / Items

• Innate Fire Spirit Pearl — An upper-grade Innate Spirit Treasure that acknowledged Lei Xiao as master after the Fire Demon God's consciousness was suppressed by the Eye of the Heavenly Dao. Lei Xiao refined its first innate restriction within three days. 11
• Wind-Repelling Seal — A Connate Spirit Treasure given to Lei Xiao by Linglong after he promised to return for her when strong enough to break the seal binding her cauldron to Wind Abyss. 38
• Tongtian's Sword Qi — A life-saving strand of Sword Qi placed in Lei Xiao by Tongtian. Lei Xiao expended it to survive Capital-Heaven Divine Thunder in Thunder Marsh. 28 41

Relationships

• Yun Xiao — Eldest sister. She helped Lei Xiao recover after his first use of Purple Firmament Origin Divine Thunder, and he later gave her artifact materials to ensure she could forge a defensive treasure. 3 34
• Qiong Xiao — Second sister. Lei Xiao suppressed the Innate Baleful Qi in her body and protected her while she refined Phoenix Divine Fire to remove it from her origin. 22 23
• Bi Xiao — Third sister and frequent traveling companion. She initially served as his protector due to her higher cultivation, while Lei Xiao repeatedly protected her from the illusion realm and other dangers. 3 6
• Tongtian — Master. Tongtian accepted Lei Xiao as a personal disciple, gave him the complete Nine-Turn Primordial Essence Art, and left him protective Sword Qi. 15 28
• Linglong — A nine-clawed Azure Dragon descendant sealed within the Fortune Dragon Cauldron. Lei Xiao taught her cultivation for a thousand years and promised to return once he could free her from Wind Abyss. 38
• Qiang Liang — Ancestral Witch of Thunder. After initially attacking Lei Xiao over Eastern Emperor Taiyi's aura, Qiang Liang removed the mark and promised Lei Xiao Capital-Heaven Divine Thunder origin after the Witch-Demon war. 42 44
• Zhao Gongming — Fellow disciple and strained associate. Lei Xiao tried to mediate between Zhao Gongming and the Three Xiao, but later suspected Zhao Gongming of plotting against him. 28 41
• Eastern Emperor Taiyi — Enemy. Taiyi left a concealed aura-mark on Lei Xiao, later attempted to capture him, and was injured by Lei Xiao's Heavenly Tribulation Authority. 42 46
• Dijun — Enemy. Dijun joined Taiyi's attempt to seize Lei Xiao and could not divine Lei Xiao's location or future. 46 47

Story Role / Major Arcs

• Defense of Three Immortal Isles — Lei Xiao established his place among the Three Xiao by defending their home from invading sea-clan cultivators at enormous personal cost. 1 2
• Dragon-Phoenix Battlefield — He protected Bi Xiao from the illusion realm, controlled the dragon projection, obtained a thunder source, and helped secure the Dragon-Phoenix Flute for her. 5 6 7
• Tang Valley and the Fire Demon God — Lei Xiao exposed the Fire Demon God's Chaos aura, summoned the Eye of the Heavenly Dao, gained the Eye of Heavenly Retribution, and received the Innate Fire Spirit Pearl. 10 11
• Tongtian's Disciple — After becoming Tongtian's personal disciple, Lei Xiao used the Nine-Turn Primordial Essence Art and Eye of Heavenly Retribution to help locate Yun Xiao and Qiong Xiao. 15 16 17
• Wind Abyss and Linglong — While seeking an Innate Spirit Treasure for Yun Xiao, Lei Xiao found Linglong within the Fortune Dragon Cauldron, accepted the Wind-Repelling Seal, and committed himself to eventually freeing her. 35 38
• Thunder Marsh — Lei Xiao entered Thunder Marsh to refine thunder sources, survived Qiang Liang's Capital-Heaven Divine Thunder, erased Taiyi's mark, gained Heavenly Tribulation Authority, and became master of three thunder wyverns. 41 42 44 46 47

Notable Quotes

“Don't be afraid, sisters. I'm still here.” 2

“Senior does not intend to kill this junior, so why should this junior be afraid?” 42