Regenerate

7th-Level Transmutation Spell (Bard, Cleric, Druid)

Casting Time: 1 minute
Range: Touch
Components: V, S, M (a prayer wheel)
Duration: 1 hour

A creature you touch regains 4d8 + 15

Hit Points (HP) are a measure of how difficult it is to kill or destroy a creature or an object. Damage reduces Hit Points, and healing restores them. You can't have more Hit Points than your Hit Point maximum, and you can't have less than 0. See also Breaking Objects and Damage and Healing.

. For the duration, the target regains 1

Hit Points (HP) are a measure of how difficult it is to kill or destroy a creature or an object. Damage reduces Hit Points, and healing restores them. You can't have more Hit Points than your Hit Point maximum, and you can't have less than 0. See also Breaking Objects and Damage and Healing.

at the start of each of its turns, and any severed body parts regrow after 2 minutes.

Source: Player's Handbook, p. 311