Avatar of Epcliptor the Distant

Eldritch Majesty. Any creature that starts its turn within 120 ft. of Epcliptor must succeed on a DC 36 Wisdom saving throw or be frightened until the start of its next turn. Upon failing by 5 or more, the creature is also confused  (under the effects of the Confusion spell) for 1 minute.

Unknowable Presence. Epcliptor is immune to divination magic, cannot be perceived through magical scrying, and cannot be targeted by Wish.

Mind-Breaking Voice. When the avatar of Epcliptor speaks, all non-aberrations within 600 ft. must succeed on a DC 36 Intelligence saving throw or take 207 (46d8) Psychic damage or half damage on a success.

Aberration Lord. Aberrations within 1000 miles of the avatar of Epcliptor gain advantage on attack rolls and saving throws. All Aberrations must obey his commands always and are always trying to achieve his goals.

Multiattack. The avatar of Epcliptor uses Fracture of Reality and makes three Tentacle of Infinity attacks.

Tentacle of Infinity. Melee Weapon Attack: +19 to hit, reach 60 ft., one target. Hit: 42 (6d10 + 9) bludgeoning damage plus 312 (48d12) Psychic damage plus 157 (35d8) Force damage. Target must succeed on a DC 36 Strength saving throw or be pulled to an unoccupied space within 5 ft. of Epcliptor.

Fracture of Reality (Recharge 5–6). The avatar of Epcliptor tears a hole in existence. The avatar chooses a point he can see within 1200 feet. Each creature of his choice within 120 feet of that point must make a DC 36 Charisma saving throw. On a failure, the creature is banished to the Far Realm until the end of their next turn, taking 473 (86d10) Psychic damage plus 70 (20d6) Force damage at the start of each of their turns until they escape. On a success, the creature is Incapacitated until the start of their next turn.

Paradox Wave (Recharge 6). The avatar of Epcliptor unleashes an impossible contradiction. All creatures in a 600-ft. radius must succeed on a DC 36 Wisdom saving throw or suffer 1170 (180d12) Psychic damage and have the Stunned condition until the end of Epcliptor’s next turn. On a successful save, they take half damage.

Psychic Blast. Ranged Attack: +19 to hit, range 500 ft./1000 ft., one target. Hit: 387 (35d12 + 160) Psychic damage.

 Shield of Unreality. Trigger: An attack roll succeeds against Epcliptor, or Epcliptor fails a saving throw. Effect: Epcliptor either adds +15 to his AC, possibly causing the attack to miss, or Epcliptor adds +15 to his saving throw, possibly causing him to succeed.

Epcliptor can take 3 legendary actions, choosing from the options below. Only one legendary action may be used at a time, and only at the end of another creature’s turn.

• Whisper of Unreality. Target one creature within 60 ft.; it must succeed on a DC 36 Wisdom saving throw or be charmed and incapacitated until the end of its next turn, hearing only Epcliptor’s voice.

• Tentacle Lash. Epcliptor makes one Tentacle of Infinity attack.

• Impossible Shift (Costs 2 Actions). Epcliptor teleports up to 500 ft. and becomes briefly intangible until the start of his next turn. During this time, he gains the Invisible condition, and he has Advantage on all saving throws.

Mythic Trait: Supreme Ruler of What Cannot Be

When reduced to 0 hit points, Epcliptor instead tears open a rift in reality. He regains 500 hit points, all conditions affecting him end, and he enters Mythic Form:

• All creatures within 300 ft. immediately take 500 psychic damage and must succeed on a DC 36 Wisdom saving throw or be blinded and deafened for 1 minute as their senses collapse.

• Epcliptor gains an additional action each turn.

• Legendary Actions increase to 4 per round.

• His lair begins unraveling: each round, 1d4 sections of terrain within 120 ft. cease to exist, creating 30-ft. wide voids of nothingness. A creature that falls into a void is subjected to 1750 (500d6) Force damage every turn until it can escape.