Death to All That Disobey Gods Rule

Make a ranged or melee spell attack against a creature you can see. On a hit, the target takes as much health as you can give. You then also take the amount of damage you gave. your character can not heal after this attack and it take two long rests to get back to full health. This spell does not care if you are immune or resistant to necrotic damage. All you can hear is  Whispers of an evil Calling to Death Death Kill Kill all.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by how much health you have.