N Large aberration
Init +0; Senses darkvision 60 ft., tremorsense 60 ft.; Perception +10
Aura stench (10 ft. radius, DC 16, 1d6+4 minutes)
AC 18, touch 11, flat-footed 16 (+2 Dex, +7 natural, –1 size)
hp 42 (5d8+20)
Fort +7, Ref +3, Will +7
Immune disease, poison
Speed 30 ft., burrow 20 ft.
Melee bite +7 (1d8+6 plus disease and grab and paralysis)
Space 10 ft.; Reach 5 ft.
Special Attacks paralysis (1d4+1 rounds, DC 16), spit entrails, swallow whole (1d4 acid plus disease and paralysis, AC 13, 4 hp)
Str 18, Dex 15, Con 19, Int 2, Wis 15, Cha 10
Base Atk +3; CMB +8 (+12 grapple); CMD 20 (28 vs. trip)
Feats Skill Focus (Perception), Great Fortitude, Weapon Focus (bite)
Skills Climb +10, Perception +10
SQ stench of undeath
Environment any underground
Organization solitary, pair, or nest (3–6)
Disease (Su) Ghoul Fever: Bite, spit entrails, and swallow whole—injury; save Fort DC 16; onset 1 day; frequency 1/day; effect 1d3 Con and 1d3 Dex damage; cure 2 consecutive saves. The save DC is Constitution-based. A humanoid who dies of ghoul fever rises as a ghoul at the next midnight. A humanoid who becomes a ghoul in this way retains none of the abilities it possessed in life. It is not under the control of any other creature, and behaves like a normal ghoul in all respects. A humanoid of 4 Hit Dice or more instead rises as a ghast.
Spit Entrails (Ex) Once every 6 hours, a ghast worm can violently invert itself, spitting its internal organs out of its mouth, filling a 15-foot cone. Doing so does not harm the ghast worm, but allows it to make one combat maneuver check against each creature inside the affected cone. For each of these creatures, if the ghast worm's check exceeds that creature's CMD, that creature takes 1d4 points of acid damage and is exposed to the ghast worm's disease and paralysis abilities. Using the spit entrails attack immediately releases any creature the ghast worm has swallowed whole. The ghast worm's internal organs immediately return to their proper place once the attack is resolved.
Stench of Undeath (Ex) Undead creatures react to a ghast worm as if it were an undead creature instead of a living creature. This doesn't guarantee that undead will do anything to assist a ghast worm, but undead that hate, target, or feed upon the living typically ignore ghast worms.