Blood Shield

Streams of blood surround and envelope your form. You can end the spell early by using an action to dismiss it.

The streams give you resistance to necrotic damage. In addition, whenever a creature within 5 feet of you hits you with a melee attack, the shield erupts and lashes out towards your attacker. The attacker takes 3d10 necrotic damage and you heal for half the damage dealt. When the spell ends, each creature in a 10 foot radius around you must make a constitution saving throw against your spell save DC. On a failure the target takes 2d6 necrotic damage. On a success the target takes half of the damage.