Blood Blade

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell's range, otherwise the spell fails. On a hit, the target suffers the attack's normal effects, and you can choose to deal 1d8 necrotic damage. This damage can’t be reduced or negated in any way, additionally, when the target takes this damage, you heal half of the necrotic damage dealt (rounded up).