Legendary Resistance (3/Day). If Abyrrus Te fails a saving throw against an effect that would cause it to lose its action, it can choose to succeed instead.

Incomprehensible. If Abyrrus Te fails on any Wisdom or Intelligence saving throw against a spell or effect that would impose a condition on it, cause it to be unable to take an action or bonus action, or cause it to be unable to target a creature with a spell or attack, Abyrrus Te ignores this effect. It still takes damage as if it had failed the save.

Otherworldly touched: If any creature is damaged by Abyruss Te's Dissonant Whispers, its Dreadsword attack or any other spell that causes psychic or necrotic damage, their Charisma is reduced by 1 for 24 hours. A Greater Restoration spell or a long rest will remove this effect. This effect stacks, and a creature reduced to 0 Charisma ceases to exist. A lesser Abyrrus born in the creature's image and posessing its memories rises within 2 rounds.

Death throes: When an Abyrrus Te dies, each creature within 30 feet of it must make a DC19 Charisma saving throw, taking 63 (18d6) psychic damage on a failed save, or half as much psychic damage on a success. The Abyrrus themself is destroyed by the blast, leaving behind no equipment or weapons.

Dreadful Aura: Any creature that strikes Abyrrus Te with an attack or spell at any range must make a DC19 Charisma save or become frightened of the Abyrrus. If the striking creature is immune to fear, they automatically succeed on the save but lose their immunity until the start of their next turn. A creature already frightened of the Abyrrus that failes the save becomes Charmed instead, becoming compelled to defend the Abyrrus until the end of their next turn.

Multiattack. The Abyrrus makes one attack with their dreadsword and two use of Spellcasting (one must be a cantrip or At Will spell), or a Death's Kiss

Dreadsword. Melee Weapon Attack: +14 to hit, reach 5 ft., one creature. Hit: 32 (4d12 + 8) slashing damage, plus the target's Charisma is reduced by 1. If the attack hits, Abyruss Te casts Dissonant Whispers on the target as a free action without spending a spell slot.

Spellcasting. Abyrrus Te is a level 11 spellcaster. His spell attack is +11 and his spell DC is 19. He can cast the following spells:

• At will: Chill Touch, Prestidigitation, Darkness, Vicious Mockery
• 1st Level (4 slots): Sleep, Inflict Wounds, Dissonant Whispers, Charm Person
• 2nd Level (3 slots): Misty Step, Suggestion
• 3rd Level (3 slots): Vampiric Touch, Counterspell
• 4th Level (2 slots): Banishment, Raulothim's Psychic Lance

Death's kiss (Recharge 6): With a full action, Abyrrus Te targets a creature within 5ft who is charmed by them, frightened, or incapacitated. The target takes 8d10 + 20 necrotic damage and the Abyrrus Te is healed for the same amount. Also the target's Charisma score is reduced by 5. Abyrrus Te can hold their grasp on the target for another round as a free action, if they do so their speed is reduced to zero for the round but the target must make a DC19 constitution save or Death's Kiss is reapplied (no action required for the Abyrrus Te).

Thief of dreams: A single spell or items effect of the Abyrrus' choice with a source within 120 feet that would normally provide a bonus to saving throws, attack rolls or ability checks fails, and the effect benefits the Abyrrus and its allies instead until the end of its next turn. If the spell effect originates from a spell being concentrated on, its caster is compelled to maintain concentration on that spell if they are able until the end of the Abyrrus' next turn.