Convalescent Mist

A haze of mist forms within a 15-foot radius centered on a point within range, 15ft tall. When the mist is summoned, restore 1d8 health to each non-hostile creature inside; creatures below half health are healed for 2d8 instead.

On following turns, as a bonus action, you may move the cloud up to 40ft and cause it to release a burst of energy, repeating the healing. When 10d8 of healing have been expended, the mist dissipates, having consumed the energy used to create it.