Armor Class 21 (natural armor)
Hit Points 420 (40d8 + 240)
Speed 30 ft., fly 60 ft.
STR
25 (+7)
DEX
17 (+3)
CON
22 (+6)
INT
22 (+6)
WIS
22 (+6)
CHA
29 (+9)
Saving Throws Str +15, Dex +11, Con +14, Wis +14
Skills Athletics +15, Deception +25, Insight +14, Intimidation +17, Perception +14, Persuasion +25
Damage Resistances cold; bludgeoning, piercing, and slashing from nonmagical attacks that aren't silvered
Damage Immunities fire, poison
Condition Immunities charmed, poisoned
Senses darkvision 120 ft., passive Perception 24
Languages Celestial, Common, Draconic, Infernal, telepathy 120 ft.
Challenge 25 (75000 XP)
Proficiency Bonus +8
Deep Wounds.
Devil's Sight.
Fear Aura.
Fiendish Regeneration.
Legendary Resistance (3/Day).
Magic Resistance.
Multiattack.
Ranseur of Torture.
Walls of Phlegethos.
Symbol of Insanity (Recharge 4–6).
Pleasure in Pain.
Ranseur.
Eruption (Costs 2 Actions).
Call Underling (Costs 3 Actions).