Anyu's Storm of Swords (Arteria)

Conjure a storm of razor-sharp rain, slicing through creatures and causing them to Bleed. Creatures must make a Dexterity saving throw or take 4d10 + spell level slashing damage, and become inflicted with bleeding. Half damage on a successful save. Creatures inflicted with bleeding take 3d6 necrotic damage, until they are healed or the spell ends.

Using a Higher-Level Spell Slot. The damage increases by 1d10/6 for each spell slot level above 4, and the radius of the spell increases by 5 feet.