Rain of Blood

6th-level necromancy (hemomancy)

Casting Time: 1 action

Range: 150 feet

Components: V, S

Duration: Concentration, up to 1 minute

You draw out your blood, turning it into rain that pours down over a 45-foot radius area within range. As you cast this spell, you must spend a number of hit points. A creature that starts its turn in the area must make a Dexterity saving throw. On a failed save, a target takes 4d6 + half the number of hit points spent as necrotic damage, and its movement speed is slowed by 5 feet for the duration of the spell. On a success, the target takes half as much damage and is not slowed. The slow can stack with itself, but it cannot reduce a creature’s speed below half.

When you cast this spell using a spell slot of 7th level or higher, the damage increases by 1d6 for each slot level above 6th.