rare ne huge fiend 

Perception +33; darkvision, scent (imprecise) 30 feet, true seeing

Languages Celestial, Infernal; telepathy 100 feet

Skills Athletics +34, Intimidation +33, Occultism +29, Religion +32, Stealth +35

Str +8 Dex +7 Con +9 Int +3 Wis +6 Cha +7

AC  41; Fort +35, Ref +27, Will +28

HP 350; Immunities evil; Weaknesses good 20

Speed 50 feet, burrow 30 feet

Melee [>] claw +32 (agile, reach 10 feet), Damage 3d8+16 slashing plus wasting wound

Melee [>] foot +30 (deadly d10), Damage 4d8+12 plus stunned 1 (DC 38 Fortitude negates)

Melee [>] jaws +32 (reach 15 feet), Damage 3d12+16 piercing plus Improved Grab

Divine Innate Spells DC 37; 6th dominate; Constant (6th) detect alignment (evil only), true seeing

Breath Weapon [>>] (curse, divine, evocation, fire) The ammut exhales a blast of flame that deals 18d6 fire damage to all creatures in a 30- foot cone (DC 37 basic Reflex save). The ammut can't use their Breath Weapon again for 1d4 rounds.

Devour Soul (curse, death, divine, necromancy) A creature whose HP drops to 0 while swallowed by an ammut has its soul consumed, as well as its body. The creature dies instantly and cannot be brought back to life except by miracle, wish, or similar magic.

Fast Swallow [R] Trigger The ammut Grabs a creature; Effect The ammut uses.

Swallow Whole.

Swallow Whole [>] Large, 3d12+8 bludgeoning, Rupture 32.

Wasting Wound (curse, divine, necromancy) A creature dealt damage by an ammut's claw Strike must succeed at a DC 37 Will save or become enfeebled 1 and drained 1 (or enfeebled 2 and drained 2 on a critical failed save). The conditions cannot be mitigated until the curse is removed, and the curse cannot be removed until all damage dealt by the claw Strike is healed. Each day, a creature afflicted with wasting wound must attempt another saving throw; on a failed save, the values of its enfeebled and drained conditions each increase by 1. If the victim dies while cursed, its soul is destroyed, as per the ammut's devour soul ability.

Extinction Curse #5: Lord of the Black Sands, page 77.