Caelus (Talaeruut)

Fiendish Blessing. The AC of Caelus includes its Charisma bonus.

Innate Spellcasting. Caelus' innate spellcasting ability is Charisma (spell save DC 22, +14 to hit with spell attacks). It can innately cast the following spells, requiring no material components:

At will: dissonant whispers, enemies abound, expeditious retreat, knock, sending, tongues

3/day each: counterspell, dispel magic, darkness, fly, greater invisibility (self only), slow, wind wall

1/day each: harm, modify memory (6th level),  plane shift, project image, simulacrum, teleport

Inscrutable. Caelus is immune to any effect that would sense its emotions or read its thoughts, as well as any divination spell that it refuses.

Magic Resistance. Caelus has advantage on saving throws against spells and other magical effects.

Magic Weapons. Caelus' weapon attacks are magical.

Mesmerizing Aura. Each creature that is within 15 feet of Caelus and able to hear it must succeed on a DC 22 Charisma saving throw or be incapacitated for 1 minute. A creature that is affected by an ability that disallows them from concentrating, such as a Barbarian's rage, makes this roll at advantage. The incapacitated creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. A creature that succeeds on a saving throw against this effect becomes immune to the Mesmerizing Aura for 24 hours.

Psychic Absorption. Whenever Caelus is subjected to psychic damage, it takes no damage and regains a number of hit points equal to half the psychic damage dealt.

Telepathic Bond. Caelus ignores the range restriction on its telepathy when communicating with a creature it has charmed. The two don't even need to be on the same plane of existence. Caelus can use its telepathy to initiate and maintain telepathic conversations with up to ten creatures at a time. Caelus can let those creatures telepathically hear each other while connected in this way.

Shapechanger. The fiend can use its action to polymorph into a Small or Medium humanoid, or back into its true form. Without wings, the fiend loses its flying speed. Other than its size and speed, its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Multiattack. Caelus makes four attacks, only one of which can be a Draining Kiss.

Rapier. Melee Weapon Attack: +13 to hit, reach 5ft., one target. Hit: 11 (1d8 + 7) slashing damage, plus 13 (3d8) necrotic damage.

Draining Kiss. Melee Weapon Attack: +13 to hit, reach 5 ft., one creature. This attack automatically hits creatures charmed by Caelus. Hit: 34 (5d10 + 7) psychic damage. The target’s hit point maximum is reduced by an amount equal to the psychic damage taken, and Caelus regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

Charm. Caelus targets one creature it can see within 30 feet of it. If the target can hear Caelus, the target must succeed on a DC 22 Wisdom saving throw against this magic or be charmed by Caelus. Any creature under the influence of Caelus' Mesmerizing Aura makes the saving throw at a disadvantage. The charmed target regards Caelus as a trusted friend to be heeded and protected. The charmed target obeys the fiend's verbal or telepathic commands, takes the fiend's requests or actions in the most favorable way it can, and is a willing target for Caelus' Draining Kiss attack. Caelus has no limitation to the number of creatures it can charm at one time.

Each time Caelus or Caelus' companions do anything harmful to the target, it can repeat the saving throw, ending the effect on itself on a success. Otherwise, the effect lasts for as many days as the target missed the saving throw DC or until Caelus is destroyed, or takes a bonus action to end the effect. If the target successfully saves against the effect, or if the effect on it ends, the target is immune to this fiend's Charm for the next 24 hours.

Etherealness. Caelus magically enters the Ethereal Plane from the Material Plane, or vice versa.

Summon Fiend (1/day). Caelus chooses what to summon and attempts a magical summoning.

Caelus has a 50 percent chance of summoning 3d8 quasit, 2d4 succubus/incubus or dybbuk, 1d8 chasme, 1d4 glabrezu, 1d3 nalfeshnee, or 1d2 marilith.

A summoned fiend appears in an unoccupied space within 60 feet of its summoner, acts as an ally of its summoner, and can’t summon other demons. It remains for 1 minute, until it or its summoner dies, or until its summoner dismisses it as an action.

Teleport. Caelus magically teleports, along with any equipment it is wearing or carrying, up to 120 feet to an unoccupied space it can see.

Instinctive Charm. When a creature within 60 feet of Caelus makes an attack roll against it, and another creature is within the attack’s range, the attacker must make a DC 22 Wisdom saving throw. On a failed save, the attacker must target the creature that is closest to it, not including Caelus or itself. If multiple creatures are closest, the attacker chooses which one to target. If the saving throw is successful, the attacker is immune to the Caelus' Instinctive Charm for 24 hours.

Caelus can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Caelus regains spent legendary actions at the start of its turn.

Attack. Caelus attacks once with its rapier.

Cast a Spell. Caelus casts one spell from its Innate Spellcasting trait.

Teleport. Caelus uses its Teleport action.

Charm (Costs 2 Actions). Caelus uses its Charm action.

Compel Fiend (Costs 2 Actions). An allied demon within 30 feet of Caelus uses its reaction to make one attack against a target of Caelus' choice that it can see.