Aspect of Momon

Boon of Immortality. Momon is immune to any effect that would age him, and he can’t die from old age.

Damage Rejuvenation. Momon heals for half the damage he does with any attack.

Event Horizon. A 20-foot radius sphere extends from Momon in all directions, it is centered on him and moves with him. Any creature that tries to exit it even by magical means, needs to make a DC 26 Strength saving throw. On a failed save the creatures takes 27 (5d10) force damage and its speed drops to 0 until the start of its next turn, on a success the creature takes half as much damage and moves 5 feet. A creature can still freely move while within the affected area it just can't exit outside it. When Momon moves any creature within the aura moves with him as if an invisible force is tugging or pushing on them. If Momon teleports any creature within the aura teleports with him remaining in the same space or the nearest unnocupied space within the aura.

Fear Aura. Any creature hostile towards Momon that starts its turn within 30 feet of him must make a DC 27 Wisdom saving throw. On a failed save, the creature is frightened until the start of its next turn. On a successful save, it is immune to this trait for 24 hours.

Immovable Body. When any effect would forcibly move Momon from his spot or cause him to be teleported, he is neither moved nor teleported.

Immutable Existance. Momon is immune to any spell or effect that would alter his form or send him to another plane of existance.

Legendary Resistance (5/Day). If Momon fails a saving throw, he can choose to succeed instead.

Living Darkness. While in dim light or darkness, Momon has resistance to damage that isn’t force, psychic, or radiant, and attacks targeting him are made with disadvantage.

Magic Weapons. Momon's weapon attacks are magical.

Unending Evil. Momon only dies if an attack from any lawfully aligned creature reduces him to 0 hit points, otherwise he remains on 1 hit point. If his hit points reach 0, Momon doesn't die, instead his being becomes a tiny slug of darkness that can be held in the palm of a Medium sized creature. The slug is then transported back into its prison where it grows to full size in 3d100 days. When the body has fully grown, Momon becomes active again, although imprisoned.

Multiattack. Aspect of Momon makes four Claw attacks. He can use his Absorb instead of a claw attack.

Claw. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 25 (3d10 + 9) slashing damage plus 14 (4d6) necrotic damage. Instead of dealing damage, Momon can grapple the target (escape DC 26).

Absorb. Momon absorbs a creature he is grappling that is one or more size categories smaller than him. The absorbed target can't breathe, is blinded, deafened and restrained, and it has total cover against attacks and other effects outside Momon. No sound can be created from within Momon, and casting spells that require verbal components is impossible. An absorbed creature takes 49 (9d10) force damage at the start of each of Momon's turns. Momon can have only one creature absorbed at a time. An absorbed creature can try to escape by taking an action to make a DC 26 Strength check. On a success, the creature escapes and enters a space of its choice within 5 feet of Momon. A creature reduced to 0 hit points is annihilated, along with any equipment it was wearing or carrying.

Shadow Step. While Momon is standing in dim light or darkness he vanishes, along with any equipment he is wearing or carrying, and any creature he had absorbed, appearing in an unoccupied space that he can see within 60 feet of him, that is also in dim light or darkness.

Aspect of Momon 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. Aspect of Momon regains spent legendary actions at the start of its turn.

Claw. Momon makes one Claw attack.

Warp. Momon uses his Shadow Step.

Disintegration Ray (Costs 2 Actions). Momon shoots an eye ray, if the target is a creature it must succeed on a DC 24 Dexterity saving throw or take 76 (17d8) force damage and be pushed back 20 feet. If this damage reduces the creature to 0 hit points, its body becomes a pile of fine gray dust.

If the target is a Large or smaller nonmagical object or creation of magical force, it is disintegrated without a saving throw. If the target is a Huge or larger object or creation of magical force, this ray disintegrates a 10-foot cube of it.