Shadowcleave

Slash out in a circular arc, hitting all enemies around you.
Deals Shadow damage to all enemies hit. Grants a stack of Infused Shadow for each enemy hit. Infused Shadow
At 15 stacks your shadowy self is released, your spells are Infused while in this form. Infused
Deals 30% increased damage and applies Slowed for 6 seconds.

Source

The current game data ties this spell to no class, and no drop, vendor or quest teaches it.

Applies status effect

Status effect
Infused Shadow
Slowed

Data as of September 7, 2026 (rev cs:1263)