Touch of Death

You send negative energy coursing through a creature that you can see within range, causing it searing pain. The target must make a Constitution saving throw. It takes 7d8 + 30 necrotic damage on a failed save, or half as much damage on a successful one.

If the target of Touch of Death dies as a result of the spell, you may take half the damage done by Touch of Death (Rounded up) to recharge it's Spell slot.