Illuga Kit: Skills and Constellations | Genshin Impact 6.3

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.

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.

 

Illuga’s Kit

Normal Attack — Oath taking Spear Technique

Normal Attack
Performs up to 5 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 — Dawn-Breaking Messenger

Summons A’dong, a faithful messenger-bird who fights alongside him.
Tap or Hold to command different attacks:

Tap:
A’dong dives forward, striking enemies in its path and dealing Geo DMG.

Hold:
Enter aiming mode to mark a target.
A’dong charges toward the marked enemy, dealing Geo DMG on impact.

A’dong is a sentinel born in coexistence with the Moonforce, a steadfast guardian of this land—unbowed even before the ferocity of the Wild Hunt.

Cooldown: 15.0s

 

Elemental Burst — Light Unshadowed

Ignites his lantern, dealing AoE Geo DMG, and grants the “Nightingale’s Nocturne” effect for 20s.

During Nightingale’s Nocturne:

• Illuga gains 21 stacks of Nightingale’s Song
• When the active nearby party member deals Geo DMG with
  Normal Attack / Charged Attack / Plunging Attack / Elemental Skill / Elemental Burst:
  — Consumes 1 stack to increase the damage, scaling with Illuga’s Elemental Mastery
  — If the damage is Lunar Crystallization Reaction DMG, the increase is further enhanced

If the attack hits multiple enemies, stacks are consumed based on the number of enemies hit.

Additionally:

• If Illuga casts this Burst while there are Geo Constructs created by nearby party members present on the field,
  or
• While Nightingale’s Nocturne is active and such Geo Constructs are created,

Illuga gains +5 Nightingale’s Song stacks per Geo Construct, up to +15 stacks per Burst cast, within 20s.

When all stacks are consumed, or when the duration ends, Nightingale’s Nocturne is removed.

“As long as the lantern in your hands continues to shine,
darkness shall never claim you.”

“Nightingale’s Song”
The effect gained after Illuga casts Light Unshadowed, boosting Geo DMG dealt by the active character.

Duration: 20.0s
Cooldown: 15.0s
Energy Cost: 60

 

Passive

Pact of the Lanternbearer

After Illuga uses Dawn-Breaking Messenger or Light Unshadowed, nearby other party members gain “Oath of the Lamp” for 20s:

• Their Geo DMG gains:
  • CRIT Rate +5%
  • CRIT DMG +10%

Moonsign • Ascendant Gleam
Characters affected by Oath of the Lamp also gain +50 Elemental Mastery.

Dusk of the Demon-Slayer

Nightingale’s Song is further enhanced:

If the party contains 1 / 2 / 3 Hydro or Geo characters (excluding Illuga):
→ Geo DMG bonus from Nightingale’s Song increases by 7% / 14% / 24% of Illuga’s Elemental Mastery

— If the damage is Lunar Crystallization Reaction DMG:
→ The bonus becomes 60% / 120% / 200% of Illuga’s Elemental Mastery

The rapid movement of the night watchman

At night (from 18:00 to 6:00), one’s own character in the team gains a rapid movement effect: their movement speed increases by 10%.

This effect does not function in Domains, Trounce Domains, or the Spiral Abyss.

 

Constellations

C1 — Sentinel Pheasant

While Illuga is on the field, when Geo-related reactions are triggered, he restores 12 Elemental Energy.
This effect can occur once every 15s.

C2 — Branch-Devouring Roe

During Nightingale’s Nocturne (from Light Unshadowed):

For every 7 stacks of Nightingale’s Song consumed:

• Illuga summons A’dong to strike a nearby enemy, dealing Geo DMG equal to:
  400% of Illuga’s Elemental Mastery + 200% of his DEF

C4 — Sun-Chasing Wolf

While Nightingale’s Nocturne is active, the active nearby party member gains +200 DEF.

C6 — Night-Warden Nightingale

Enhances the Passive Talent Pact of the Lanternbearer (Oath of the Lamp):

• Geo DMG dealt gains:
  • CRIT Rate +10% → (instead of 5%)
  • CRIT DMG +30% → (instead of 10%)

Moonsign • Ascendant Gleam:
Characters affected by Oath of the Lamp gain +80 Elemental Mastery.
(Requires Pact of the Lanternbearer to be unlocked.)

 

 

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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