Sibriex (CR 15)

Large Outsider (Chaotic, Evil, Extraplanar, and Obyrith)
Alignment: Always chaotic evil
Initiative: -4 (Dex); Senses: darkvision 60 ft., true seeing, Listen +25, and Spot +25
Languages: Abyssal; telepathy 100 ft.


AC: 25 (-1 size, -4 Dex, +20 natural), touch 5, flat-footed 25
Hit Dice: 15d8 (217 hp); DR: 15/cold iron and lawful
Fort +19, Ref +5, Will +16
Speed: Fly 20 ft. (good)
Space: 10 ft./5 ft. (15 ft. with chains)
Base Attack +15; Grapple +25
Attack: 4 chains +20 melee and bite +15 melee
Damage: 4 chains 2d6+6, bite 1d8+3
Special Attacks/Actions: animate chains, instant graft, squirt bile, spell-like abilities
Attack Options: Combat Expertise, Improved Trip
Abilities: Str 22, Dex 3, Con 30, Int 25, Wis 24, Cha 25
Special Qualities: Fast healing 10; Immune acid, mind-affecting spells and effects, nausea, poison, Resist cold 10, electricity 10, fire 10; SR 26, immobility, form of madness, flight, obyrith traits
Feats: Combat Expertise; Dark Speech; Graft Flesh (fiendish grafts); Greater Spell Focus (enchantment); Improved Trip; Spell Focus (enchantment)
Skills: Bluff +25, Concentration +28, Decipher Script +25, Diplomacy +29, Gather Information +25, Heal +25, Intimidate +27, Knowledge (arcana) +25, Knowledge (the planes) +25, Listen +25, Search +25, Sense Motive +25, Spellcraft +27, Spot +25, and Use Magic Device +25 (+29 scrolls)
Advancement: 16-29 HD (Large); 30-45 HD (Huge)
Climate/Terrain: Any land and underground
Organization: See text
Treasure: Double standard (magic items)

Source: Fiendish Codex I