C1: Crow's Eye

When Tengu Juurai grants characters ATK Bonuses or hits opponents, the CD of Tengu Stormcall is decreased by 1s.
This effect can be triggered once every 3s.

C2: Dark Wings

Unleashing Tengu Stormcall will leave a weaker Crowfeather at Kujou Sara's original position that will deal 30% of its original DMG.

C3: The War Within

Increases the Level of Subjugation: Koukou Sendou by 3.
Maximum upgrade level is 15.

C4: Conclusive Proof

The number of Tengu Juurai: Stormcluster released by Subjugation: Koukou Sendou is increased to 6.

C5: Spellsinger

Increases the Level of Tengu Stormcall by 3.
Maximum upgrade level is 15.

C6: Sin of Pride

The Electro DMG of characters who have had their ATK increased by Tengu Juurai has its CRIT DMG increased by 60%.