based on D&D 5th Edition
Huge  Fiend Demon, Chaotic Evil

Armor Class 17  (natural)
Hit Points 172  (15d12+75)
Speed 40 ft. , swim 20 ft.

20  (+5) 15  (+2) 21  (+5) 19  (+4) 17  (+3) 16  (+3)
Saving Throws Str +9, Con +9, Wis +7, Cha +7
Damage Resistances Bludgeoning, Fire, Frost, Lightning, Piercing, Slashing
Damage Immunities Poison
Condition Immunities Poisoned
Senses truesight, passive Perception 13
Languages Abyssal, Telepathy
Challenge 9  (5000 XP)
Innate Spellcasting. At will: darkness, dispel magic. (1/day) confusion, fly, power word stun.
Magic Resistance. Has advantage on spell and magic saving throws.
Multiattack. Make two pincer and two fist attacks or two pincer attaks and cast a spell
Pincer. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 16 (2d10+5) bludgeoning damage. Medium and smaller targets grappled, escape DC 15
Fist. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 7 (2d4+2) bludgeoning damage.
Darkness. Magical darkness spreads from an orgin point within range to fill a area burst 2. No line of sight through darkness area. Darkness can hide magical light.
Dispel Magic. Detect the presence of magic within 6
Confusion. 1 uses Target is confused at start of targets turn, roll 1d20 (1-2) Moves in random direction. (3-12) Takes no action this turn. (13-16) Randomly targets creature within reach with a melee attack. (17-20) Acts normally.DC 16 Charisma save
Fly. 1 uses Target creature gains flight until end of battle. Flight speed of 12.DC 16 save
Power Word Stun. 1 uses A target in range 24 can be stunned.DC 16 Constitution save