Large ancient demon, unknown race, lawful evil

Armor Class: 25

Hit Points: 864

Speed: 80 ft , fly: 100 ft

STR

28 +9

DEX

32 +11

CON

29 +9

INT

35 +12

WIS

33 +11

CHA

36 +13

Saving Throws: Str: +9, Dex: +11, Cons: +10, Int: +15, Wis: +17, Cha: +16

Skills: Multiattack: "The Trickster" makes two weapon attacks of it's choosing.   Revel In Dispair: "The Trickster" gains 3d10 of health everytime it frightens a creature.   Arcanic Superiority: "The Trickster" counterspells any spell level 5 or below if the spell is casted directly at it. AOE spells which have no target do not get counterspelled.   True Form: "The Trickster" may revel it's true form at any time. Any creatures within eyesight of it will be immediatly frightened, prone, blinded, incapacitated, paralyzed, petrified, and exhausted.   The One Above All: "The Trickster" enters your mind causing you to see what it wants you too. It becomes aware of all your wants, desires, memories,etc.. "The trickster" then forces you to be trapped into a nightmare and dominates every aspect of the creature. The creature must succeed a d20 wisdom saving throw every turn or become controlled by the demon.

Damage Resistances: Damage from any non-magical source

Damage Immunities: Necrotic, Psychic, Cold, Fire, Thunder, Lightning

Senses: Truesight 400ft, Blindsight 400ft, Darkvision 400ft, Passive Perception 20

Languages: Abyssal, telepathy 600 ft.

Challenge Rating: 30 ( 155000 XP)

Proficiency Bonus: +9

Actions

Multiattack: "The Trickster" makes 3 attacks on it's turn. Necrotic Claws, Disrupt Life/Frightening Gaze, and a spell attack.   Frightening Gaze. The lich fixes its gaze on one creature it can see within 10 feet of it. The target must succeed on a DC 18 Wisdom saving throw against this magic or become frightened for 1 minute. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to the lich’s gaze for the next 24 hours.   Disrupt Life. Each non-undead creature within 20 feet of the lich must make a DC 18 Constitution saving throw against this magic, taking 21 (6d6) necrotic damage on a failed save, or half as much damage on a successful one.   Necrotic Claws. +18 to hit. Necrotic Claws does 10d8 of necrotic damage abd gives the creature one level of exhaustion.

Bonus Actions

Teleport. "The Trickster" teleports to anywhere within a 60ft radius.

Reactions

Counterspell.

Legendary Actions

"The Trickster" gets 3 Legendary actions.   Replenish Spell Slots(1 Legendary Action): The Demon replenishes every spell slot.   Born Again(1 Legendary Action): The Demon regains all of it's health instantly.   Left Or Right( 3 Legendary Actions): The Demon races rapidly into the air above all creation looking down upon the world. With it's right hand it destroys all of reality. With it's left hand it rewrites reality in it's vision or it's controllers vision. Once this action is taken however, the Demon will cease to exist since it cannot exist in a reality itself was not born into. This does not mean however, a new version of the Demon is not created into this new reality. This action allows the demon or controller the ability to rewrite the history of reality however they wish.