Luka is a Physical Nihility character who applies Bleed DoT. His Skill inflicts Bleed, dealing damage over time, and his Ultimate boosts the damage enemies take (debuff). His Talent increases damage to Bleeding targets, and his Basic Attacks refresh Bleed duration. This makes Luka great for sustained DoT damage and softening enemies for allies to finish off.
Best Cavern Relics
(2) ATK increases by 12%.
(4) For every DoT the target enemy is afflicted with, the wearer will ignore 6% of its DEF when dealing DMG to it. This effect is valid for a max of 3 DoTs.
This set maximizes Luka’s Bleed damage output.
Best Planar Ornaments
(2) Increases the wearer's ATK by 12%. When the wearer's SPD is equal to or higher than 135/160, the wearer deals 12%/18% more DMG.
This set’s damage bonus only activates if Luka has 135–160 Speed, so having good Speed substats lets him get the full benefit.
Best Stats
Body
Effect Hit Rate
Boots
SPD
Sphere
Physical DMG Boost
Rope
ATK%
Substats
Effect Hit Rate / SPD / ATK% / Break Effect
info
For Luka, you should prioritize Effect Hit Rate first to reliably apply Bleed, aiming for at least 67% total. Next, focus on ATK% to boost his Bleed damage, followed by Speed to take more turns and help meet Speed thresholds if you’re using sets like Glamoth.
Best Light Cones
SourceStellar Warp, Departure Warp, Character Event Warp, Light Cone Event Warp
Toiler
For every debuff the target enemy has, the DMG dealt by the wearer increases by 12~24%, stacking up to 3 time(s). This effect also applies to DoT.Good Night and Sleep Well is an excellent 4★ Light Cone for Luka, especially in DoT-focused teams. It increases his damage by up to 24% per debuff on the target (up to three stacks), which synergizes perfectly with Luka’s Bleed and other debuffs from allies. Since Luka constantly applies and maintains Bleed, he can consistently benefit from the full damage bonus. This makes it one of his most reliable and accessible Light Cones for boosting his overall DoT potential.
SourceStellar Warp, Light Cone Event Warp, Starlight Exchange, Stellar Convergence
Inheritor
Increases the wearer's DMG to debuffed enemies by 24~40%. When the wearer uses their Skill, the Effect Hit Rate for this attack increases by 18~30%, and ATK increases by 24~40%.This is also a great Light Cone for Luka. It increases his Effect Hit Rate (making Bleed application more reliable) and boosts his Skill damage and damage against debuffed enemies, which fits his playstyle perfectly. This means Luka lands Bleed more consistently while dealing more damage to targets already suffering debuffs. Overall, it’s a strong 5★ option to enhance both his consistency and damage output.
SourceLight Cone Event Warp
Wordly Affairs Leave No Mark
Increases the wearer's Effect Hit Rate by 60~100%. After the wearer uses Basic ATK, Skill, or Ultimate to attack an enemy target, there is a 60% base chance to inflict "Unarmored" on the target. While in the Unarmored state, the enemy target receives 10~18% increased DMG, lasting for 2 turn(s). If the target is under a DoT state inflicted by the wearer, there is a 60% base chance to upgrade the "Unarmored" state inflicted by the wearer to the "Cornered" state, which additionally increases the DMG the enemy target receives by 14~22%, lasting for 2 turn(s). During this period, the wearer cannot inflict "Unarmored" on the target.Those Many Springs is good for Luka because it gives Energy Regen Rate (more Ultimates) and increases damage based on Speed, which helps him act faster and deal more Bleed damage.
SourceStellar Warp, Departure Warp, Character Event Warp, Light Cone Event Warp
Self-Confidence
Increases the wearer's Effect Hit Rate by 20~40% and increases DoT by 24~48%.Eyes of the Prey is very good for Luka because it boosts Effect Hit Rate (so Bleed lands more often) and increases DoT damage, directly making his Bleed stronger and more reliable.
SourceUnderground Shop, Echo of War, Memo-Keeping Light Casket, Light Cone Manifest
Semibreve Rest
Increases the wearer's Break Effect by 16~32%, and increases their DMG to enemies afflicted with Shock or Wind Shear by 16~32%. This also applies to DoT.Fermata is a solid 4★ choice for Luka because it increases DoT damage and boosts damage against enemies with Shock or Wind Shear. While Luka mainly applies Bleed (not Shock), he still benefits from the general DoT damage bonus, making it a decent but less optimal pick compared to Good Night and Sleep Well or Eyes of the Prey.
Chaos Elixir
Increases the wearer's Break Effect by 20~40%. When the wearer uses their Ultimate, increases DoT dealt by the wearer by 24~48%, lasting for 2 turn(s). When a target enemy suffering from DoT imposed by the wearer is defeated, regenerates 4.0~6.0 Energy for the wearer.Solitary Healing isn’t really ideal for Luka. While it increases DoT damage and boosts Break Effect after using Ultimate, Luka doesn’t rely much on Break Effects, so it’s usually less efficient than other options like Good Night and Sleep Well or Eyes of the Prey.
Prisoner in Deep Confinement
Firmament Frontline: Glamoth
Good Night and Sleep Well4★
In the Name of the World5★
Those Many Springs5★
Eyes of the Prey4★
Fermata4★
Solitary Healing5★