Plague Spewer (CR 10)

Huge Undead
Alignment: Always neutral evil
Initiative: -1 (Dex); Senses: darkvision 60 ft.

AC: 23 (-2 size, -1 Dex, +16 natural), touch 7, flat-footed 23
Hit Dice: 16d12 (104 hp); DR: 10/slashing
Fort +5, Ref +4, Will +11
Speed: 40 ft.
Space: 15 ft./15 ft.
Base Attack +8; Grapple +26
Attack: Slam +16 melee
Full Attack: 2 slams +16 melee
Damage: Slam 1d8+10 plus plague
Special Attacks/Actions: Plague, vomit rat swarm
Abilities: Str 31, Dex 9, Con -, Int -, Wis 12, Cha 16
Special Qualities: undead traits
Feats: -
Skills: -
Advancement: 17-32 HD (Huge); 33-48 HD (Gargantuan)
Climate/Terrain: Underground
Organization: Solitary or pair plus 2d4 rat swarms
Treasure: Standard

Source: Monster Manual III

Myriad lumps move just under the skin of this huge, gruesome, humanoid-shaped creature. Its bloodless complexion resembles a corpse.

These mindless undead creatures lumber about, seeking to kill any living creature except for rats and vermin. If one finds its way into civilization it, and the rat swarms it brings, can deplete the population of a town.

A plague spewer's greatest threat is the devastating disease it carries. Unlike many such ailments, this one spreads merely from contact. Thus, those seeking to help the afflicted often become victims themselves. Plague spewers stand 22 feet tall and weigh 10 tons.