Armor Class 23 (natural armor)
Hit Points 336 (32d8 + 192)
Speed 0 ft.
STR
19 (+4)
DEX
26 (+8)
CON
22 (+6)
INT
25 (+7)
WIS
28 (+9)
CHA
26 (+8)
Saving Throws Dex +16, Con +14, Int +15, Wis +17
Skills Acrobatics +24, Deception +16, Intimidation +16, Perception +25, Persuasion +16, Stealth +16
Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks that aren't silvered
Damage Immunities cold, fire, poison
Condition Immunities charmed, poisoned
Senses darkvision 120 ft., passive Perception 35
Languages Celestial, Common, Draconic, Infernal, telepathy 1,000 ft.
Challenge 26 (90000 XP)
Proficiency Bonus +8
Armor of Ice.
Devil's Sight.
Legendary Resistance (3/Day).
Magic Resistance.
Sub-zero.
Multiattack.
Touch of Stygia.
Ice Bolt.
Blizzard (Recharge 4–6).
Spellcasting.
Counterspell.
Amnesia.
Froststrike.
Call Underling (Costs 3 Actions).