Blood Bolt

You create a bolt of blood and fire it at a target within range that you can see. Make a ranged spell attack. On a hit, the target takes 1d8 piercing damage and must succeed on a Constitution saving throw or be unable to regain hit points until the end of its next turn.

This spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).