C1: Conviction

Diluc deals 15% more DMG to opponents whose HP is above 50%.

C2: Searing Ember

When Diluc takes DMG, his ATK increases by 10% and his ATK SPD increases by 5%. Lasts for 10s.
This effect can stack up to 3 times and can only occur once every 1.5s.

C3: Fire and Steel

Increases the Level of Searing Onslaught by 3.

C4: Flowing Flame

Casting Searing Onslaught in rhythm greatly increases damage dealt.
2s after casting Searing Onslaught, casting the next Searing Onslaught in the combo deals 40% additional DMG. This effect lasts for 2s.

C5: Phoenix, Harbinger of Dawn

Increases the Level of Dawn by 3.

C6: Flaming Sword, Nemesis of the Dark

After casting Searing Onslaught, the next 2 Normal Attacks within the next 6s will have their DMG and ATK SPD increased by 30%.
Additionally, Searing Onslaught will not interrupt the Normal Attack combo.