Uzollru

Legendary Resistance (4/Day). If the uzollru fails a saving throw, it can choose to succeed instead.

Magic Resistance. The uzollru has Advantage on saving throws against spells and other magical effects.

Regeneration. The uzollru regains 10 hit points at the start of its turn if it has at least 1 Hit Point. If the uzollru takes Radiant damage, this trait doesn’t function at the start of the uzollru's next turn.

Multiattack. The uzollru makes two Claw attacks and three Tentacle Slam Attacks.

Claw. Melee Weapon Attack: +18, reach 30 ft. Hit: 34 (7d6 + 10) damage, and the target is Grappled (escape DC 26).

Tentacle Slam. Melee Weapon Attack: +18, reach 30 ft. Hit: 19 (2d8 + 10) Bludgeoning damage plus 3 (1d6) Psychic damage, and the target's Hit Point Maximum is reduced by the amount of Psychic damage dealt.

Squeeze. Strength Saving Throw: DC 26, one creature the uzollru has Grappled. Failure: 35 (10d6) Bludgeoning damage. Success: Half damage.

Legendary Action Uses: 3. Immediately after another creature’s turn, the uzollru can expend a use to take one of the following actions. The uzollru regains all expended uses at the start of each of its turns.

Batter. The uzollru moves up to half its Speed, and it makes one Claw attack.

Induce Delusion. Charisma Saving Throw: DC 21, each non-demon creature in a 120-ft. Cone. Failure:  The target has the Stunned condition until the start of the uzollru's next turn. Success: The target's Speed is 0 until the start of the uzollru's next turn. The uzollru can’t take this action again until the start of its next turn