Blood Boil

To cast this spell you must first take 1d4 damage to your maximum hit points, regardless if the creature takes damage or not.

You cause a creature you can see in ranges blood to boil and pulse through its skin. The target must make a Constitution saving throw. On a failed save, the target takes 2d4 fire damage, and its speed is halved until the end of its next turn.

The spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4) to yourself and 1d4 when you reach 5th level (3d4), 11th level (4d4), and 17th level (5d4) to the targeted creature.

You recover 1d4 hit points up to your max each long rest, the dice increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).