Aspect of Demogorgon (CR 9)

Large Outsider (Chaotic, Evil, Extraplanar, and Tanar'ri)
Alignment: Chaotic evil
Initiative: +7(+3 Dex, +4 Improved Initiative); Senses: darkvision 60 ft.; see invisibility always (as spell caster level 11th), Listen +21, and Spot +21
Languages: Abyssal, Common; telepathy 100 ft.

AC: 23 (-1 size, +3 Dex, +11 natural), touch 12, flat-footed 20
Hit Dice: 11d8+55 (104 hp); DR: 10/cold iron and good
Fort +12, Ref +10, Will +12
Speed: 35 ft.
Space: 10 ft.; Reach 10 ft.
Base Attack +11; Grapple +19
Attack: Melee: 2 tentacles +15 (1d6+5)
Special Attacks/Actions: dual action, gaze
Attack Options: Combat Reflexes
Abilities: Str 21, Dex 16, Con 21, Int 20, Wis 21, Cha 20
Special Qualities: Immune: electricity, poison; Resist: acid 10, cold 10, fire 10; tanarri traits
Feats: Alertness, Combat Reflexes, Dodge, Improved Initiative
Skills: +7 following tracks, +7 on other planes, +9 following tracks in aboveground natural settings, +9 following tracks on other planes), Concentration +19, Craft (alchemy) +19, Diplomacy +21, Jump +19, Knowledge (arcana) +19, Knowledge (history) +19, Knowledge (nature) +19, Knowledge (the planes) +19, Listen +21, Search +19, Sense Motive +19, Spellcraft +7, Spot +21, Survival +5 (+7 aboveground natural settings, and Swim +19
Advancement: -
Climate/Terrain: The Abyss, Demogorgons palace
Organization:
Treasure/Possessions: DMs discretion (bribes and gifts)

Source: Web enhancement

An aspect of Demogorgon's natural weapons, as well as any weapons it wields, are treated as chaotic-aligned and evil-aligned for the purpose of overcoming damage reduction.

Dual Actions (Ex): An aspect of Demogorgon, just like Demogorgon itself, takes two rounds' worth of actions in any given round. Thus, it can make a full attack and take a double move; make two full attacks and two 5-foot steps; a full attack, a move action, and another attack; and so on.

See Invisibility (Su): An aspect of Demogorgon has a continuous see invisibility ability, as the spell (caster level 11th).

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).

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).

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.

Tanarri Subtype

Most demons encountered outside of the Abyss are tanar'ri. The most populous of the demon subtypes, the tanar'ri form the largest and most diverse group of demons. They are the unchallenged masters of the Abyss at this time. The first tanar'ri were forged from the souls of the first humanoids drawn to the Abyss. Most tanar'ri incorporate humanoid features into their forms as a result of their close ties to the mortal realm.

Traits: A tanar'ri possesses the following traits (unless otherwise noted in a creature's entry).