The arcanaloth from Dungeon Magazine #149, updated for Pathfinder RPG.
Hey berk, there’s a whole post over here with info on all the daemons/yugoloths not in Pathfinder, including the arcanadaemon.
Arcanadaemon CR 17
NE Medium outsider (daemon, extraplanar, evil)
Init +14; Senses darkvision 60 ft.; Perception +33
AC 35, touch 20, flat-footed 25 (+10 Dex, +15 natural)
hp 261 (18d10+126)
Fort +13, Ref +21, Will +15
DR 15/good and silver; Immune acid, death effects, disease, mind-affecting effects, poison; Resist cold 10, electricity 10, fire 10; SR 26
Speed 30 ft., fly 50 ft. (good)
Melee 2 claws +28 (1d6+5 plus Strength drain), bite +25 (2d6+5)
Special Attacks Strength drain (DC 28 Fort; 1d6/1 Str drain), swift evoker
Spell-Like Abilities (CL 17th; concentration +23):
At will—darkness, fear (DC 23), greater teleport (self plus 50 pounds of objects only), heat metal (DC 19), invisibility, magic missile, major image (DC 20), telekinesis, warp wood (DC 19)
1/day—summon (level 9, 1 arcanaloth, 100%)
Sorcerer Spells Known (CL 12th; concentration +18)
6th (4/day)—chain lightning (DC 25)
5th (6/day)—cone of cold (DC 24), wall of force
4th (7/day)—locate creature, polymorph, wall of fire
3rd (8/day)—dispel magic, displacement, fireball (DC 22), lightning bolt (DC 22)
2nd (8/day)—flaming sphere (DC 21), locate object, scorching ray, shatter (DC 21), web
1st (8/day)—burning hands (DC 20), comprehend languages, mage armour, shield, shocking grasp
0 (at will)—acid splash, arcane mark, detect magic, ghost sound (DC 17), mage hand, mending, open/close, prestidigitation, read magic
Str 20, Dex 30, Con 28, Int 23, Wis 18, Cha 24
Base Atk +18; CMB +23; CMD 43
Feats Arcane BlastAPG, Arcane Strike, Empower Spell, Eschew Materials, Flyby Attack, Greater Spell Focus (evocation), Improved Initiative, Spell Focus (evocation), Weapon Finesse
Skills Bluff +28, Diplomacy +25, Fly +31, Intimidate +25, Knowledge (arcana) +27, Knowledge (planes) +27, Knowledge (any one other) +24, Linguistics +27, Perception +33, Sense Motive +25, Spellcraft +27, Use Magic Device +28; Racial Modifiers +8 Perception
Languages Daemonic, Abyssal, Aklo, Aquan, Auran, Celestial, Common, Draconic, Dwarven, Elven, Giant, Githzerai, Githyanki, Gnoll, Goblin, Ignan, Infernal, Orc, Slaadi, Sylvan, Terran; telepathy 100 ft.
SQ cantrips, change shape (Small or Medium humanoid, alter self), flight
Environment any (Gehenna)
Organization Solitary, pair, or embassy (3–4)
Flight (Su) An arcanadaemon’s ability to fly is a constant magical effect that cannot be dispelled.
Swift Evoker (Ex) An arcanadaemon is particularly adept at quickly casting spells of the school of evocation. Once every 1d4 rounds, an arcanadaemon may cast any evocation spell it knows as a free action, as if it were a quickened spell. Many arcanadaemons are fond of casting burning hands in this manner as they attack with their claws.
Spells (Sp) An arcanadaemon casts spells as a 12th-level sorcerer.