Angel of Decay (CR 15)

Large Undead
Alignment: Always chaotic evil
Initiative: +6 (+2 Dex, +4 Improved Initiative); Senses: darkvision 60 ft., Listen +29, and Spot +29

AC: 28 (-1 size, +2 Dex, +13 natural, +4 deflection), touch 15, flat-footed 26
Hit Dice: 26d12+29 (198 hp); DR: 10/adamantine and magic
Fort +14, Ref +18, Will +26
Speed: 30 ft., fly 50 ft. (poor)
Space: 10 ft./10 ft.
Base Attack +13; Grapple +35
Attack: Claw +21 melee
Full Attack: 2 claws +21 melee plus 2 wing slams +16 melee plus rotting touch
Damage: Claw 2d6+18, wing slam 1d6+11
Special Attacks/Actions: Rotting aura, rotting touch
Abilities: Str 37, Dex 14, Con -, Int 20, Wis 20, Cha 18
Special Qualities: SR 24, undead traits, unholy grace
Feats: Cleave; Combat Reflexes; Great Fortitude; Improved Initiative; Improved Toughness; Iron Will; Lightning Reflexes; Power Attack; Toughness
Skills: Concentration +29, Diplomacy +6, Hide +48, Knowledge (arcana) +29, Listen +29, Move Silently +26, Search +29, Sense Motive +29, Spellcraft +31, Spot +29, and Survival +5 (+7 following tracks)
Advancement: 27-36 HD (Large); 37-63 HD (Huge)
Climate/Terrain: Any land and underground
Organization: Solitary
Treasure: Standard

Source: Libris Mortis

A repulsive, extremely tall, humanlike creature with long, rotting wings and peeling flesh, this monstrosity continually sheds rivulets of filth and decay, creating a pool of rot in which it stands.

A mockery of a true angel, an angel of decay may appear similar to an angelic outsider only by happenstance, not design. It is an undead creature that is powered by decay.

When a healthy creature softens, crumbles, and liquefies in death, an indefinable essence wafts away like putrid steam off stagnant beach sand. This decomposing flesh radiates an essential energy in its dissipation, and an angel of decay can extract the power resident therein.

An angel of decay stands about 9 feet tall and weighs between 500 and 700 pounds.

Angels of decay speak Common and Abyssal.