Corpse Gatherer (CR 19)

Gargantuan Undead
Alignment: Usually neutral
Initiative: +2 (Dex); Senses: Listen +33 and Spot +33

AC: 12 (-4 size, -2 Dex, +8 natural), touch 4, flat-footed 12
Hit Dice: 30d12+60 (255 hp); DR: 15/magic bludgeoning
Fort +14, Ref +10, Will +19
Speed: 40 ft., burrow 10 ft.
Space: 20 ft./20 ft.
Base Attack +15; Grapple +39
Attack: Slam +24 melee (Slam +26 vs good)
Full Attack: Slam +24/+19/+14 melee (+26/+21/+16 vs good)
Damage: Slam 2d12+20/19-20
Special Attacks/Actions: Improved grab, ingest corpses, swallow whole
Abilities: Str 34, Dex 7, Con -, Int 10, Wis 11, Cha 15
Special Qualities: Desanctifying aura (Fort Save +12), soul binding, SR 30, undead traits, zombie-spawn
Feats: Blind-fight; Cleave; Great Cleave; Great Fortitude; Improved Bull Rush; Improved Critical (slam); Improved Initiative; Improved Overrun; Improved Sunder; Power Attack; Weapon Focus (slam)
Skills: Climb +29, Jump +28, Listen +33, Search +33, and Spot +33
Advancement: Advancement: 31-60 HD (Colossal)
Climate/Terrain: Any land and underground
Organization: Solitary, pair, or cluster (3-5)
Treasure: None

Source: Monster Manual II

A corpse gatherer is an animated graveyard empowered by a mean intelligence and a greed for more bodies. It exists only to increase its own size and power by devouring more dead bodies. It seeks corpses everywhere, from cemeteries to battlefields to scenes of natural disasters.

A corpse gatherer appears roughly humanoid, but its immense body is made up of corpses, tombstones, and grave earth. From a distance, the creature resembles a hulking giant made of earth and stones, but upon closer inspection, a viewer can detect the occasional dead hand, head, or other appendage protruding from its form.

These creatures are thought to spawn from the burial of a sentient undead creature (such as a vampire) in unconsecrated ground. The lingering taint of undeath somehow permeates the earth, causing the entire graveyard - corpses, tombstones, and all - to coalesce into a ravening undead monster.

Corpse gatherers feast upon dead flesh, but they are more than willing to create fresh corpses by slaying living creatures. A single corpse gatherer has been known to destroy several entire villages to sate its unceasing hunger.

Though corpse gatherers are not themselves evil, their undead taint extends to any living prey they devour. The soul of a creature consumed by a corpse gatherer is trapped within the latter's body along with its corpse. Thus, the soul cannot escape (so the creature cannot be raised or resurrected) until the corpse gatherer itself is destroyed.