Fraz-Urb'luu (5.5)

Large Fiend (Demon), Chaotic Evil
Armor Class 18 (natural armor)
Hit Points 337 (27d10 + 189)
Speed 40 ft., fly 40 ft.
STR
29 (+9)
DEX
12 (+1)
CON
25 (+7)
INT
26 (+8)
WIS
24 (+7)
CHA
26 (+8)
Saving Throws Dex +8, Con +14, Int +15, Wis +14
Skills Deception +15, Perception +14, Stealth +8
Damage Resistances cold, fire, lightning
Damage Immunities poison; bludgeoning, piercing, and slashing that is nonmagical
Condition Immunities charmed, exhaustion, frightened, poisoned
Senses truesight 120 ft., passive Perception 24
Languages all, telepathy 120 ft.
Challenge 23 (50000 XP)     Proficiency Bonus +7
Legendary Resistance (3/Day).
Magic Resistance.
Undetectable.
ACTIONS
Multiattack.
Bite.
Fist.
Phantasmal Terror.
Spellcasting.
LEGENDARY ACTIONS
Tail.
Terror (Costs 2 Actions).

This full creature's stat block is not available (not OGL).

All demons are liars, but Fraz-Urb'luu is the Prince of Deception and Demon Lord of Illusions.
Monsters of the Multiverse
Fraz-Urb'luu (5.5)