Bedlam Demon, Golden One

Chaos Resistance. The golden one is resistant to all damage.

Cunning Action. The golden one can take the disengage, dash, or hide action as a bonus action.

Devil's Sight. Magical darkness doesn't impede the golden one’s darkvision.

Innate Spellcasting. The golden one’s innate spellcasting ability is Charisma (spell save DC 17, +9 to hit with spell attacks). It can innately cast the following spells, requiring no material components:

At-will: Chaos Bolt, Invisibility

3/day each: Dimension Door, Polymorph

1/day: Hold Monster

Insightful.  The golden one always knows if it hears a lie.

Multiattack. The golden one makes three attacks: two with its claws and one with its sting.

Claw. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 8 (2d8 + 4) chaos damage.

Sting. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 13 (2d8 + 4) chaos damage plus 17 (5d6) poison damage, and the target must succeed on a DC 15 Constitution saving throw or become poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Terrible Screech (recharge 5/6). The golden one releases a supersonic scream just above the ability to hear. Each creature that is not a chaos or bedlam demon in a 60 foot cone in front of it must succeed on a DC 15 wisdom saving throw or take 35 (10d6) thunder damage and be deafened and stunned for 1 minute, taking half and not being deafened or stunned on a success. A creature can repeat the saving throw at the end of each of its turns, ending the effect on a success.

Uncanny Dodge. If a creature would hit the golden one with an attack, it can use its reaction to half the attack’s damage against it.