Aura of Regeneration

You channel powerful healing energy out to all allied creatures within 30 ft. of you. For the duration of the spell, the targets regain 4d8 + your spell casting ability modifier hit point at the start of each of their turns.

When the spell ends, the targets’ severed body members (fingers, legs, tails, and so on), if any, are restored. If you have the severed part and hold it to the stump, the spell instantaneously causes the limb to knit to the stump.