The material below is Open Game Content from a 3PP Source
This black-skinned, bat-winged demon has four arms; a long, thin tail; and a leering, fanged face with dead, white eyes.
Vrolikai (CR 19; 204,800 XP)
CE Large outsider (chaotic, demon, evil, extraplanar)
Init +10; Senses darkvision 120 ft., low-light vision, true seeing; Perception +36
AC 35, touch 16, flat-footed 28
(+6 Dex, +1 dodge, +19 natural, –1 size)
hp 332 (19d10+228)
Fort +18, Ref +17, Will +17
DR 15/cold iron and good; Immune death effects, electricity, poison; Resist acid 10, cold 10, fire 10; SR 30
Speed 40 ft., fly 60 ft. (perfect)
Melee +1 black flame knife +29/+24/+19/+14 (1d6+11/19–20 plus energy drain), 3 +1 black flame knives +29 (1d6+6/19–20 plus energy drain), bite +23 (1d8+5), sting +23 (1d6+5 plus madness) or bite +28 (1d8+10), 4 claws +28 (1d6+10), sting +28 (1d6+10 plus madness)
Space 10 ft.; Reach 10 ft.
Special Attacks black flame knives, death-stealing gaze, multiweapon mastery
Spell-Like Abilities (CL 19th; concentration +27)
At will—deeper darkness, enervation, greater teleport (self plus 50 lbs. of objects only), telekinesis (DC 23)
3/day—quickened enervation, regenerate, silence (DC 20), vampiric touch
1/day—mass hold monster (DC 27), summon (level 6, 1 marilith 50% or 1d4 glabrezus 75%), symbol of death (DC 27)
Str 30, Dex 23, Con 35, Int 22, Wis 23, Cha 26
Base Atk +19; CMB +30; CMD 47
Feats Cleave, Combat Expertise, Dodge, Flyby Attack, Improved Initiative, Improved Vital Strike, Mobility, Power Attack, Quicken Spell-Like Ability (enervation), Vital Strike
Skills Acrobatics +25 (+29 jump), Bluff +30, Fly +34, Intimidate +27, Knowledge (arcana) +25, Knowledge (planes) +28, Perception +36, Sense Motive +28, Spellcraft +25, Stealth +24 (+32 in shadowy areas), Survival +25, Use Magic Device +27; Racial Modifiers +8 Perception, +8 Stealth in shadowy areas
Languages Abyssal, Celestial, Draconic; telepathy 100 ft.
Environment any (the Abyss)
Black Flame Knives (Su) A vrolikai can manifest daggers made of crystallized black flames in each of its four hands as a free action. These weapons function as +1 daggers that bestow one permanent negative level on a successful hit. A DC 27 Fortitude negates the negative level, although on a critical hit, no save is allowed. The save DC is Charisma-based.
Death-Stealing Gaze (Su) 1 permanent negative level, 30 ft., DC 27 negates. Creatures slain by these negative levels become juju zombies under the vrolikai's control. The save DC is Charisma-based.
Madness (Su) A creature stung by a vrolikai's tail must make a DC 27 Will save to resist taking 1d6 points of Charisma drain and becoming confused for 1d4 rounds. On a successful save, the victim is instead staggered for 1d4 rounds as strange visions assault its mind. This is a mind-affecting effect. The save DC is Charisma-based.
Multiweapon Mastery (Ex) A vrolikai never takes penalties on its attack roll when fighting with multiple weapons.
A vrolikai is 14 feet tall but weighs only 500 pounds. Unlike other demons, it does not form from a sinful soul—it instead manifests from a nabasu demon that returns to the Abyss after growing to maturity on the Material Plane. Not all nabasus survive this transformation, but those who do become powerful indeed—vrolikai usually rule large regions of unclaimed Abyssal land, and often serve as assassins or ambassadors to demon lords in need of an agent in a distant realm.