Cauterizing Flame

A willing creature you touch regains a number of hit points equal to 2d10 + your spellcasting ability modifier. However, the creature can no longer regain hit points by any other means until it completes a short or 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 1d10 for each slot level above 1st.