unique ce huge amphibious demon fiend 

Perception +46; darkvision, true seeing

Languages Abyssal, Common, Elven, Sylvan; telepathy 300 ft.

Skills Acrobatics +40, Arcana +38, Athletics +45, Intimidation +46, Nature +49, Occultism +38, Religion +45, Stealth +40

Str +12 Dex +9 Con +11 Int +7 Wis +8 Cha +8

Items Gumoriamar (page 313)

AC  54; Fort +42, Ref +40, Will +43; +2 status to all saves vs. magic

HP 550, regeneration 50 (deactivated by good); Immunities mental, poison, death effects, disease; Weaknesses good 20; Resistances acid 20, cold 15, fire 15, physical 20 (except cold iron)

Aura of Corruption (aura, plant, primal, transmutation) 120 feet. Plants near Nuzik twist, deform, and transform into thorny or fungoid parodies of their natural shapes. A living creature in this area must succeed at a DC 47 Fortitude save each round or become partially transformed into plantlike matter. Those who fail this saving throw are treated as if they were plants for the purposes of any effect that particularly harms or inconveniences plant creatures more than other creatures, but do not gain any benefits of being plant creatures. This effect lasts as long as the creature remains within the area of corruption and for 1 minute thereafter.

Attack of Opportunity [R]

Speed 60 feet, fly 60 feet, swim 40 feet; freedom of movement

Melee [>] Gumoriamar +47 (acid, chaotic, evil, magical, reach 15 feet, sweep; page 313), Damage 4d12+15 slashing plus 1d6 acid, 1d6 chaotic, and 1d6 evil, and 2d6 slashing vs. plants

Melee [>] jaws +45 (agile, chaotic, evil, magical, reach 15 feet), Damage 4d10+18 slashing plus 2d6 chaotic and 2d6 evil

Primal Innate Spells DC 49, attack +43; 10th horrid wilting, time stop, wall of thorns; 9th Abyssal wrath (at will), dispel magic (at will); 6th tangling creepers (at will); 5th Abyssal plague (at will); 3rd earthbind (at will); 2nd telekinetic maneuver (at will); Cantrips (9th) telekinetic projectile; Constant (8th) true seeing; (4th) freedom of movement

Primal Rituals DC 49; Abyssal pact, planar ally

Defoliation [>>] (primal, necromancy, plant) Nuzik exudes a pulse of sickly green light in a 30-foot-radius emanation. All plants in the area (including creatures under the effect of his aura of corruption) blacken and wither. Non-creature plants immediately wither and die. Plant creatures take 20d8 negative damage with a DC 49 basic Fortitude save. A creature that fails its save is doomed 1 for 1 minute and sickened 3. Nuzik can choose to exclude any number of plants in the area from this effect, and generally does so to preserve twisted and corrupted plants or fungi, or plant creatures that are allied to his cause. Nuzik can't use Defoliation for 1d4 rounds.

Dispelling Strike [F] (abjuration, primal) Frequency once per round; Trigger Nuzik hits a creature, object, or spell effect with a weapon Strike or a defoliation attack. Effect Nuzik casts his innate dispel magic, targeting the creature he hit with his Strike or one spell affecting that creature.

Staggering Strike When Nuzik scores a critical hit with a melee attack, the target is stunned 2.

Bestiary, page 312.