Evard's Flesh Meld

A creature you touch regains a number of hit points equal to 3d8 + your spellcasting ability modifier. The target must make a DC 12 - your proficiency bonus Constitution save. If they fail the save, they suffer one level of exhaustion, but are still healed. 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 1d8 for each slot level above 1st.