Transfusion

A creature you touch regains a number of hit points equal to 2d8 + your spellcasting ability modifier, and you lose hit points equal to half that amount owed to blood loss, this damage cannot be reduced or negated in any way.

This spell has no effect on creatures without a vascular system.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the healing increases by 2d8 for each slot level above Ist.