Death Magic

You Draw upon the residual life force of the dying to replenish your own. If a living creature dies within 10 feet of you while this spell is active, as a reaction you can roll a die equal to your hit dice to heal a number of hit points equal to the result plus your spellcasting ability modifier.

At Higher Levels: When you cast this spell using a spell slot of 3rd or higher, the number of dice you may roll increases by 1 for each slot above 2nd