Entropic Reaper (CR 12)

Medium Undead (Extraplanar and Chaotic)
Alignment: Always chaotic evil
Initiative: +6 (+2 Dex, +4 Improved Initiative); Senses: darkvision 60 ft., Listen +26, and Spot +26

AC: 20 (+2 Dex, +8 natural), touch 12, flat-footed 18
Hit Dice: 19d12+19 (142 hp); DR: 10/cold iron and lawful
Fort +17, Ref +8, Will +13
Speed: 30 ft.
Space: 5 ft./5 ft.
Base Attack +9; Grapple +18
Attack: Large scythe +13 melee
Full Attack: Large scythe +13/+8 melee
Damage: Large scythe 2d6+18 plus entropic blade/19-20/x4)
Special Attacks/Actions: Entropic blade, spell-like abilities
Abilities: Str 29, Dex 14, Con -, Int 11, Wis 20, Cha 15
Special Qualities: fast healing 10, master of the scythe, SR 22, undead traits
Feats: Combat Reflexes; Improved Critical (scythe); Improved Toughnesst; Power Attack; Cleave; Improved Initiative; Whirlwind Attack
Skills: Concentration +23, Knowledge (planes) +23, Listen +26, and Spot +26
Advancement: 20-35 HD (Medium)
Climate/Terrain: Ever-Changing Chaos of Limbo
Organization: Solitary
Treasure: Standard

Source: Libris Mortis

*Includes adjustments for Power Attack feat.

A skeletal being cloaked in a great black robe and head-concealing hood holds a large scythe in both hands. The head of the scythe is an absence in space, a blade-shaped hole in reality that draws in the light around it.

Entropic reapers are undead that arise in Limbo. They enforce the twisted edicts of chaotic beings that decree the death of lawful creatures (though an entropic reaper as not particular about the alignments of the creatures it brings low). Though originating in Limbo, entropic reapers spend much of their time in the Material Plane, seeking to apply their entropic scythes to the necks of the living.

Entropic reapers stand about 6-1/2 feet tall and weigh about 180 pounds.

Entropic reapers speak Common, Abyssal, and Celestial.

Extraplanar Subtype

A subtype applied to any creature when it is on a plane other than its native plane. A creature that travels the planes can gain or lose this subtype as it goes from plane to plane. This book assumes that encounters with creatures take place on the Material Plane, and every creature whose native plane is not the Material Plane has the extraplanar subtype (but would not have when on its home plane). An extraplanar creatures usually has a home plane mentioned in its description. These home planes are taken from the Great Wheel cosmology of the D&D game (see Chapter 5 of the Dungeon Master's Guide). If your campaign uses a different cosmology, you will need to assign different home planes to extraplanar creatures.

Creatures not labeled as extraplanar are natives of the Material Plane, and they gain the extraplanar subtype if they leave the Material Plane. No creature has the extraplanar subtype when it is on a transitive plane; the transitive planes in the D&D cosmology are the Astral Plane, the Ethereal Plane, and the Plane of Shadow.

Chaotic Subtype

A subtype usually applied only to outsiders native to the chaotic-aligned Outer Planes. Most creatures that have this subtype also have chaotic 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 a chaotic alignment, no matter what its alignment actually is. The creature also suffers effects according to its actual alignment. A creature with the chaotic subtype overcomes damage reduction as if its natural weapons and any weapons it wields were chaotic-aligned (see Damage Reduction).