Illuga’s full skill kit has surfaced via leaks, offering an early look at Genshin Impact’s upcoming 4-star Geo polearm unit debuting in Version 6.3’s Lunar IV update. He appears as a lantern-bearing support who empowers Geo reactions through Elemental Mastery scaling, Nightingale’s Song stacks, and team-wide Geo buffs.
Here’s a tidy, easy-to-read breakdown of Illuga’s leaked kit so you can check everything at a glance. Since this is based on early leak data, some values may shift in the official 6.3 version.
Table of Contents
Illuga’s Overview
|
Element |
Weapon |
Rarity |
|
Geo |
Polearm |
⭐⭐⭐⭐ |
Illuga enters Genshin Impact 6.3 (Luna IV) as a flexible 4-star Geo polearm support who enhances Geo damage through EM-driven buffs and “Nightingale’s Song” stack consumption. His Burst creates a unique damage window that empowers every Geo hit—Normal, Charged, Plunge, Skill, or Burst—scaling directly with his Elemental Mastery and amplifying Lunar Crystallization reaction damage. Combined with his ability to generate additional stacks from Geo Constructs, Illuga naturally encourages team styles that lean into coordinated Geo triggers and structured field setups.
Beyond his EM-based amplification, Illuga strengthens his team with “Oath of the Lamp,” granting Geo units extra CRIT Rate, CRIT DMG, and Elemental Mastery, with high-impact improvements at higher constellations. Parties containing more Hydro or Geo characters benefit even further from his passive scaling, making him shine in reaction-focused squads and multi-Geo lineups. Overall, Illuga stands out as an accessible, synergy-rich Geo support who rewards smart team building and precise timing.
Curious how Illuga’s kit actually turns into real damage? Dive into our Illuga full build guide to see the best artifacts, weapons, teams, and tips that make his Burst window truly shine.
Illuga’s Kit
Normal Attack — Oath taking Spear Technique
Normal Attack
Performs up to 4 consecutive spear strikes.
Charged Attack
Consumes a certain amount of Stamina to lunge forward, dealing damage to opponents along the way.
Plunging Attack
Plunges from mid-air to strike the ground below, damaging opponents along the path and dealing AoE DMG upon impact.
Elemental Skill — Dawnbearing Songbird
Summons the trusty messenger bird, "Gale." Different effects are produced depending on whether the skill is Tapped or Held.
Tap:
Gale dashes towards enemies in front, dealing Geo DMG to enemies it comes into contact with.
Hold
Hold to enter aiming mode, and command Gale to dash towards opponents being aimed at, dealing Geo DMG to opponents it comes into contact with. .
Cooldown: 15.0s
Elemental Burst — Shadowless Reflection
Light the lamp, dealing AoE Geo DMG, and gain Haunted Night's Oriole-Song effect for 20s. When this effect is active, Illuga gains 21 stacks of Nightingale's Song. When Normal Attacks, Charged Attacks, Plunging Attacks, Elemental Skills, and Elemental Bursts of nearby active party members deal Geo DMG to opponents, 1 stack of Nightingale's Song is consumed to increase the DMG dealt. Increase in DMG is based on Illuga's Elemental Mastery. If DMG is inflicted by Lunar-Crystallize, DMG dealt will increase further.
When Geo DMG dealt in this manner hits multiple opponents, multiple stacks of Nightingale's Song will be consumed, depending on how many opponents are hit.
Additionally, if there are Geo Constructs created by nearby party members on the battlefield while Illuga unleashes his Elemental Burst, or when nearby party members create Geo Constructs while Haunted Night's Oriole-Song is active, every Geo Construct on the battlefield will allow Illuga to gain 5 additional stacks of Nightingale's Song. Illuga can gain a maximum of 15 additional stacks of Nightingale's Song this way for up to 20s after unleashing his Elemental Burst.
When all stacks of Nightingale's Song have been consumed, or when the state's duration ends, the Haunted Night's Oriole-Song effect will end.
“Nightingale’s Song”
The effect gained after lluga unleashes his Elementa Burst Shadowless Reflection. It can increase the Geo DMG inficted by current active characters.
Duration: 20.0s
Cooldown: 15.0s
Energy Cost: 60
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Passive
Torchforger's Covenant
After unleashing Elemental Skill Dawnbearing Songbird or Elemental Burst Shadowless Reflection, nearby party members will gain the Lightkeeper's Oath effect for 20s: Geo DMG dealt to opponents and CRIT Rate increase by 5%, CRIT DMG increases by 10%.
Moonsign: Ascendant Gleam
When party members are affected by the Lightkeeper's Oath effect, Elemental Mastery is increased by 50.
Moonsign Benediction: Unwithering in Winter
When Illuga is in the party, the party's Moonsign will increase by 1 level.
Does not take effect in Domains, Trounce Domains, or Spiral Abyss. Swift Stride does not stack.
Constellations
C1 — Vigilant Sentinel
When Illuga is on the field, he will regain 12 Elemental Energy after a Geo-related Reaction is triggered. This effect can be triggered once every 15s.
C2 — Elk with Fanged Antlers
When Elemental Burst Shadowless Reflection's Haunted Night's Oriole-Song effect is active, for every 7 stacks of Nightingale's Song consumed, Illuga will summon Gale, dealing a single instance of Geo DMG to 1 nearby opponent. The DMG dealt is based on 400% of Illuga's Elemental Mastery and 200% of his DEF.
C3 — Earthshaking Bear
Increases the Level of Elemental Burst Shadowless Reflection by 3. Maximum upgrade level is 15.
C4 — Solarhunter Wolf
When Elemental Burst Shadowless Reflection's Haunted Night's Oriole-Song effect is active, nearby active party members will have their DEF increased by 200.
C5 — Solarhunter Wolf
Increases the Level of Elemental Skill Dawnbearing Songbird by 3. Maximum upgrade level is 15.
C6 — Nightmare Orioles
Enhances the Lightkeeper's Oath effect of the Passive Talent Torchforger's Covenant: For Geo DMG dealt to opponents, CRIT Rate is increased by 10%, CRIT DMG is increased by 30%.
Moonsign: Ascendant Gleam:
When characters are affected by Lightkeeper's Oath, Elemental Mastery is increased by 80.
Requires the Passive Talent Torchforger's Covenant.
Loved his kit? Same. And if you’re planning to build him on day one, you’ll want to start stocking up early. Here’s the full list of materials Illuga needs to shine.
Conclusion
Illuga’s leaked kit points to a Geo support who funnels Elemental Mastery-scaling buffs into Geo damage and Lunar Crystallization-style reactions, while rewarding teams that build around Geo constructs and Hydro/Geo lineups. With Nightingale’s Song stacks, Oath of the Lamp buffs and a constellation set that further amplifies EM and CRIT stats, he looks tailored for players who enjoy reaction-focused Geo teams.
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Henry Smith Experienced Game Editor
Greetings! I’m a veteran game editor and strategy guide creator with over a decade of experience exploring the worlds of action RPGs and gacha adventures. From the elemental battlegrounds of Genshin Impact, to the cosmic journeys of Honkai: Star Rail, and the fast-paced combat of Wuthering Waves, I dive deep into the mechanics, meta, and moments that define each game. What can you expect? In-depth guides, expert commentary, and practical insights to sharpen your gameplay and expand your understanding of the titles you love.
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