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

Spellcasting. The Yaldabaoth is a 20th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 20, +12 to hit with spell attacks). Yaldabaoth can cast the following spells:

 Once per day: Feeblemind , Shapechange

The Deadly Sins. Yaldabaoth uses one of their deadly sins.

Pride. Melee Weapon Attack: +11 to hit, reach 30 ft., one target. Hit (10d12 +5) psychic damage. This attack is not resistible. Anyone hit by this attack is stunned until the end of their next turn.

Greed. Melee Weapon Attack: +11 to hit, reach all targets within 30 ft. radius. Hit (7d12 +  5)  psychic damage.

Wrath. Melee Weapon Attack: +11 to hit, reach 30 ft., one target. Hit (6d12 +  5)  psychic damage. This attack always has advantage. This attack is a critical hit on a 15 above.

Envy. Ranged Weapon Attack: +13 to hit, range 120 ft., one target. Hit: 56 (9d10 + 7) force damage. The attacked creature must succeed on a DC 20 Constitution check or otherwise become Blinded until the end of the creature's next turn.

Lust. Ranged Weapon Attack: +13 to hit, range 120 ft., one target. Hit: 51 (8d10 + 7) force damage. The attacked creature must succeed on a DC 20 Charisma saving throw or otherwise become Poisoned as they become lustful.

Gluttony.  Ranged Weapon Attack: +13 to hit, range  120 ft., one target. Hit: 45 (7d10 + 7) force damage. The attacked creature must succeed on a DC 20 Wisdom saving throw or otherwise become Restrained. 

Sloth.  Ranged Weapon Attack: +13 to hit, range 120 ft., one target. Hit: 40 (6d10 + 7) force damage. The attacked creature must succeed on a DC 20 Constitution saving throw  or otherwise suffer 1 level of exhaustion.

Note. Any creature who has suffered from [Tooltip Not Found],  Restrained or  Poisoned can remake the saving throw at the end of their turn.

Conditional shield. Yaldabaoth can shield themselves against one attack only giving themselves +10 to their AC.

Once Yaldabaoth reaches half of its hit point, Yaldabaoth will attack with all seven of its deadly sins and then spend a turn without acting. This Mythic trait can only be used once per long rest.