Channeled Healing

You channel restorative energy into a creature in range. At the start of their turn, the target may use one of their hit dice to heal. The spell ends when the target runs out of hit dice, or concentration ends. When the spell ends, the caster must sacrifice one hit dice or suffer one level of exhaustion. This spell has no effect on undead or constructs.

The target and caster also get minty fresh breath. How 'bout that?

At higher levels: At level 11, when the target heals as a result of this spell the caster heals for the same amount.