Transfusion

You create a thick floating disk of rapidly moving blood around you. The blood lasts for the duration or until you cast this spell again. When you cast the spell, you can make a melee spell attack against a creature within 5 feet. On a hit, the target takes 1d8 piercing damage + your spellcasting ability modifier. You heal for the full damage dealt. 

As a bonus action on your turn, you can choose 15 feet and repeat the attack against a creature.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for every level above the 3rd.