uncommon ce large fiend 

Perception +23; darkvision, psionic scent (imprecise) 120 feet

Languages Abyssal

Skills Athletics +25, Intimidation +22, Stealth +23, Survival +25

Str +7 Dex +5 Con +6 Int +0 Wis +5 Cha +4

Survival +25 Str +7, Dex +5, Con +6, Int +0, Wis +5

Cha +4.

Psionic Scent A xilvirek can sense the presence of creatures with an Intelligence of at least –3. Creatures that have silenced their thoughts through magic or other means can potentially counteract this sense at the GM's discretion.

AC  34; Fort +26, Ref +21, Will +19

HP 215; Weaknesses good 10, lawful 10

Hypnotic Stench (aura, emotion, enchantment, incapacitation, mental) 30 feet. A creature that begins its turn in the area must succeed at a DC 32 Will save or become fascinated with the xilvirek. If the creature is already fascinated by the xilvirek and fails its save, the creature is compelled to approach the xilvirek and allow itself to be grabbed, which ends the fascination.

Attack of Opportunity [R]

Speed 40 feet, swim 30 feet

Melee [>] jaws +25 (chaotic, evil, magical), Damage 3d10+13 piercing

Melee [>] claw +27 (agile, chaotic, evil, magical, reach 10 feet), Damage 2d8+13 slashing plus Grab

Melee [>] tail +25 (chaotic, evil, magical, reach 15 feet, versatile p), Damage 3d6+13 bludgeoning plus Knockdown

Divine Innate Spells DC 28; 6th teleport (self only); 4th dimension door (at will); 2nd darkness (at will)

Disgorge Bile [>>] (acid, inhaled) The xilvirek retches a small pool of debilitating, acrid bile onto itself. All creatures within 30 feet take 4d6 acid damage as they inhale the bile's noxious fumes (DC 32 basic Fortitude save; on a failure, the creature is sickened 1, or sickened 2 on a critical failure). The xilvirek can't Disgorge Bile again for 1d4 rounds.

Feasting Tentacles The xilvirek has two tentacles on its back that it can use to suck the life from its prey. A creature that starts its turn grabbed by the xilvirek becomes drained 1, and the xilvirek regains 20 HP. The drained value increases by 1 on each subsequent round that the creature starts its turn grabbed, but the xilvirek doesn't regain additional HP from draining the same creature more than once per day.

Extinction Curse #4: Siege of the Dinosaurs, page 84.