Armor Class undefined
Hit Points 40 + 10 for each spell level above 4th
Speed 30 ft., fly 30 ft.
Damage Immunities psychic
Senses darkvision 60 ft., passive Perception 10
Languages Deep Speech, understands the languages you speak
Challenge —
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.
Multiattack. The aberration makes a number of attacks equal to half this spell's level (rounded down).
Eye Ray (Beholderkin Only). Ranged Spell Attack: to hit, range 150 ft., one creature. Hit: 1d8 + 3 + summonSpellLevel psychic damage.
Claws (Slaad Only). Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 1d10 + 3 + summonSpellLevel slashing damage. If the target is a creature, it can't regain hit points until the start of the aberration's next turn.
Psychic Slam (Star Spawn Only). Melee Spell Attack: to hit, reach 5 ft., one creature. Hit: 1d8 + 3 + summonSpellLevel psychic damage.
Tasha's Cauldron of Everything, p. 109