Unholy Grasp

You make a melee spell attack against a creature your size or smaller within 5 feet. If the attack misses it does not consume a spell slot. On a hit the target takes 2d8 necrotic damage and is grappled. At the beginning of each of their turns, they make either a dexterity or strength check against your spell save DC plus your strength to escape you grapple. As a bonus action you can deal another 2d8 damage to the target being held. While grappling this person you cannot take actions that would require your hand holding them or cast spells. If this kills the target, they cannot be revived by a spell under the level this spell is cast, and you gain temporary hit points equal to double its challenge rating with a minimum of 1.