Armor Class 19 (natural armor)
Hit Points 364 (27d10 + 216)
Speed 30 ft., fly 60 ft.
STR
28 (+9)
DEX
14 (+2)
CON
26 (+8)
INT
25 (+7)
WIS
19 (+4)
CHA
26 (+8)
Saving Throws Dex +10, Con +16, Wis +12
Skills Arcana +15, Deception +16, Insight +12, Persuasion +16
Damage Resistances cold; bludgeoning, piercing, and slashing from nonmagical attacks that aren't silvered
Damage Immunities fire, poison
Condition Immunities poisoned
Senses truesight 120 ft., passive Perception 14
Languages Common, Infernal, telepathy 120 ft.
Challenge 25 (75000 XP)
Proficiency Bonus +8
Fear Aura.
Legendary Resistance (3/Day).
Magic Resistance.
Multiattack.
Greatsword.
Tail.
Spellcasting.
Fireball.
Tactical Edge (Costs 2 Actions).
Summon Ice Devil (Costs 3 Actions).