Rotripper (CR 7)

Large Undead
Alignment: Always chaotic evil
Initiative: -1 (Dex)

AC: 15 (-1 size, -1 Dex, +7 natural), touch 8, flat-footed 15
Hit Dice: 8d12 (52 hp); DR: 10/silver
Fort +2, Ref +5, Will +10
Speed: 30 ft.
Space: 5 ft./10 ft.
Base Attack +4; Grapple +4
Attack: 2 claws +8 melee, additional claws +6 melee
Full Attack: 2 claws +8 melee, additional claws +6 melee
Damage: primary claws 1d8+5, secondary claws 1d8+2
Special Attacks/Actions: Grab, remove limb, rend
Abilities: Str 20, Dex 8, Con -, Int 12, Wis 14, Cha 13
Special Qualities: Undead, absorb limbs
Feats: Track; Multiattack
Skills: Climb +13, Hide +3, Search +9, and Survival +20
Advancement: 9-16 HD (Large), 17-24 HD (Huge)
Climate/Terrain: Any
Organization: Solitary or gang (3-8)
Treasure: Standard

Source: Dragon Annual 5

A rotripper (pronounced rot-ripper) appears as a decaying 10-foot-tall ogre corpse with more than two arms; rotrippers possess more than twelve arms in all, each of different sizes and shapes. A rotripper created from a humanoid or giant other than an ogre is exceedingly rare.

The rotripper understands that lairing in heavily populated areas is dangerous and thus prefers to lurk in out-of-the-way locales such as mountain passes or roads through dense forests. Every rotripper is incredibly patient and persistent, and only death stops it from tracking a victim once it decides it wants the victim's arms. This obsession with collecting arms was likely instilled long ago when the Cult of Tharizdun created the first rotrippers as a sort of "bloodhound" to track down victims who had escaped the cult's clutches.

Animals avoid rotripper lairs; birds and insects won't even fly over them.

A rotripper is impossible to control without powerful magic. The necromancers or priests who create these undead beings generally do not want them to serve as guardians or servants as a result. Generally, a rotripper is created only to sow destruction and pain in the world.

Creating a rotripper requires an armless ogre corpse. This corpse must have a pair of living ogre limbs grafted to its body by magical means. Next, the body must be anointed with the blood of a vampire and the spittle of any demon. The creator must then animate the body by means of either a limited wish spell or a specialized version of the raise dead spell. The newly created rotripper might attack its creator in an attempt to steal her arms, so a means of restraining or controlling it is recommended.