Plague Blight (CR 6)

Medium Undead (Evil)
Alignment: Always evil (any)
Initiative: +5 (Dex); Senses: darkvision 60 ft., Listen +13, and Spot +13
Languages: usually Common

AC: 23 (+5 Dex, +8 natural), touch 15, flat-footed 18
Hit Dice: 6d12+6 (45 hp); DR: 5/slashing
Fort +2, Ref +7, Will +7
Speed: 30 ft.
Space: 5 ft./5 ft.
Base Attack +3; Grapple +7
Attack: Slam +7 melee
Full Attack: Slam +7 melee
Damage: Slam 1d6+6 [+2 against good-aligned foes] and gangrenous touch
Special Attacks/Actions: Gangrenous touch
Abilities: Str 19, Dex 21, Con -, Int 14, Wis 14, Cha 15
Special Qualities: gangrenous stench, resistant to blows, undead traits, +2 turn resistance
Feats: Alertness; Cleave; Improved Toughnesst; Power Attack
Skills: Balance +7, Escape Artist +12, Hide +14, Jump +6, Listen +13, Move Silently +14, Spot +13, and Tumble +14
Advancement: 7-12 HD (Medium); 13-18 HD (Large)
Climate/Terrain: Any
Organization: Solitary, pair, or rot (6-10)
Treasure: Standard

Source: Libris Mortis

Soft and putrescent, this creature's form is wrapped in tight circles of cloth, though bloated, swollen tissue still seeps through. The odor of this creature goes beyond the stink of carrion; the putrefaction of its body is like a physical force that moves before it.

Plague blights are animated corpses of humanoids who died from plague or rot. In undeath, they seek to putrefy all that is pure. They are wily and may attempt to trick their victims into allowing themselves get close enough to touch.

Plague blights speak whatever languages they spoke before being claimed by plague, plus Common.

Evil Subtype

A subtype usually applied only to outsiders native to the evil-aligned Outer Planes. Evil outsiders are also called fiends. Most creatures that have this subtype also have evil alignments; however, if their alignments change, they still retain the subtype. Any effect that depends on alignment affects a creature with this subtype as if the creature has an evil alignment, no matter what its alignment actually is. The creature also suffers effects according to its actual alignment. A creature with the evil subtype overcomes damage reduction as if its natural weapons and any weapons it wields were evil-aligned (see Damage Reduction).