Summon Slaad, star spawn, or beholderkin

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).

Claws (Slaad Only). Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target. Hit: 1d10 + 3 + the spell’s level slashing damage. If the target is a creature, it can’t regain hit points until the start of the aberration’s next turn.

Eye Ray (Beholderkin Only). Ranged Spell Attack: your spell attack modifier to hit, range 150 ft., one creature. Hit:1d8 + 3 + the spell’s level psychic damage

Psychic Slam (Star Spawn Only). Melee Spell Attack:your spell attack modifier to hit, reach 5 ft., one creature. Hit: 1d8 + 3 + the spell’s level psychic damage