Regeneration (Slaad Only): The aberration regains 5 hit points at the start of its turn if it has at least 1 hit point.
Whispering Aura (Star Spawn Only): At the start of each of the aberration's turns, each creature within 5 feet of the aberration must succeed on a Wisdom saving throw against your spell save DC or take 2d6 psychic damage, provided that the aberration isn't incapacitated.