Blood Blast

You distill a bolt of energy from your own vitality and launch it at a creature within range. Make a spell attack against the target. On a hit, the target takes 6d6 necrotic damage, but you take necrotic damage equal too half of the damage that the target took.

If you miss, you still roll for damage and take necrotic damage equal to half of the total.

At Higher Levels. When you cast this spell at 4th level or higher, increase the damage dealt by 2d6 for each spell level above 3rd.