Bloodseize

6-level Transmutation

Casting Time: 1 action

Range/Area: Self

Components: V, S

Duration: Concentration, up to 10 minutes

As part of casting this spell, you must expend three hit dice or the spell automatically fails. Until the spell ends, your blood vessels become strikingly visible beneath your skin, and you gain the following benefits:

When you cast this spell, and as an action on a subsequent turn while this spell is active, you cure yourself of all diseases and neutralize all poisons affecting you.
If a creature within 20 feet that you can see makes an attack roll against you for the first time on its turn, it must succeed on a Constitution saving throw or take necrotic damage equal to one of the hit dice you spent to cast this spell and lose the attack.
If a creature is within 30 feet of you, you can use your action to attempt to control the blood within the creature’s veins, forcing its body to move to your whims. The target must succeed on a Constitution saving throw or take necrotic damage equal to two of the hit dice you spent to cast this spell. If it fails its saving throw, you can move it up to 15 feet in any horizontal direction and have it make a weapon attack against a target you can see within the weapon’s range. A creature that is Huge or larger has advantage on the saving throw.

The benefits of this spell have no effect on creatures that don’t have blood in them.