Cocooned

Caster picks a target to encase in a thick cocoon, the target regains 1D6 HP + their constitution modifier every turn within a round and are considered incapacitated. The spell ends if the target is at full HP, the caster is attacked successfully and loses concentration or the cocoon is successfully destroyed. Otherwise the spell will dissipate after 1 minute. All creatures make disadvantage attack rolls on the cocoon itself. The cocoon has an 18 AC.

If casted at 4th level, the target regains 2D6 HP + constitution modifier.

If casted at 5th level, the target regains 4D6 HP + constitution modifier.