Bazhenov's Instant Respite

By sacrificing your body's own recuperative abilities you're able to heal a creature a number of hit points equal to one of your hit die + your spellcasting ability modifier. You lose that hit dice to use during short rests, these die are still recovered during a long rest.  This spell has no effect on undead or constructs.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the healing increases by 1 hit dice for each slot level above 1st. The number of hit die lost is increased by 1 for each slot level above 1st as well.