Glimmerskin (CR 8)

Medium Outsider (Incorporeal)
Alignment: Usually neutral
Initiative: +1 (Dex); Senses: Spot +17
Languages: Telepathy 100 ft.

AC: 14 (+1 Dex, +3 deflection), touch 14, flat-footed 13
Hit Dice: 12d8+24 (78 hp); DR: 5/magic
Fort +10, Ref +9, Will +10
Speed: Fly 50 ft. (perfect)
Space: 5 ft./5 ft.
Base Attack +13; Grapple +0
Attack: Energy touch +13
Full Attack: Energy touch +13
Damage: Energy touch
Special Attacks/Actions: Energy touch
Abilities: Str -, Dex 13, Con 14, Int 11, Wis 15, Cha 16
Special Qualities: heroic bond, incorporeal subtype, outsider traits, plane shift, SR 15
Feats: Cleave; Great Cleave; Improved Bull Rush; Improved Sunder; Power Attack
Skills: Bluff +18, Diplomacy +22, Intimidate +13, Knowledge (arcana) +15, Knowledge (the planes) +15, Search +15, Sense Motive +17, Spellcraft +9, and Spot +17
Advancement: By character class
Climate/Terrain: Any land and underground
Organization: Solitary
Treasure/Possessions: None

Source: Monster Manual II

Energy Touch (Su): The positively energized touch of glimmerskin heals a target of 5 points of damage pet round or grants 5 additional temporary hit points per round to a creature already at full hit points. These temporary hit points fade 1d6 rounds after the creature ceases physical contact with the glimmerskin. However, this benefit has an unfortunate side effect. For each round that its hit points (including temporary ones) exceed its normal hit point total, the target creature must make a successful Fortitude save (DC 19) or explode in a 20-foot burst of radiant energy. Each creature caught in the blast (including the target) takes damage equal to 2d6 points + the number of excess hit points the target had at the time. A Reflex save (DC 19) reduces the damage by half. A glimmerskin's host automatically benefits from the additional hit points but is allowed no saving throw to reduce the damage from the blast. Glimmerskins rarely inform their hosts of this side effect.

Heroic Bond (Su): A glimmerskin bonds by enveloping its host. A bonded host gains a +4 bonus on melee attack rolls, a +2 armor bonus to AC, access to the glimmerskin's feats (with the prerequisite Strength score of at least 13), and any class features the glimmerskin may have. Additionally, a host who can turn undead gains a +5 bonus on the roll to determine Hit Dice affected. In exchange, the host shares half of any earned experience points with the glimmerskin. Spells that protect against Positive Energy Plane effects prevent a glimmerskin from bonding to a host.

Incorporeal Subtype: A glimmerskin can be harmed only by other incorporeal creatures, +1 or better magic weapons, spells, spell-like abilities, and supernatural abilities. The creature has a 50% chance to ignore any damage from a corporeal source, except for force effects or attacks made with ghost touch weapons. A glimmerskin can pass through solid objects, but not force effects, at will. Its attacks ignore natural armor, armor, and shields, but deflection bonuses and force effects work normally against them. A glimmerskin always moves silently and cannot be heard with Listen checks if it doesn't wish to be.

Outsider Traits: A glimmerskin has darkvision (60-foot range). It cannot be raised or resurrected.

Plane shift (Sp): A glimmerskin can use plane shift at will (caster level 12th; Will save DC 18).

Telepathy (Su): A glimmerskin can communicate telepathically with any creature within 100 feet that has a language.

Feats: A glimmerskin's feats become usable only when the creature is bonded with a host who has a Strength score of at least 13.

Incorporeal Subtype

Some creatures are incorporeal by nature, while others (such as those that become ghosts) can acquire the incorporeal subtype. An incorporeal creature has no physical body. It can be harmed only by other incorporeal creatures, magic weapons or creatures that strike as magic weapons, and spells, spell-like abilities, or supernatural abilities. It has immunity to all nonmagical attack forms. Even when hit by spells, including touch spells or magic weapons, it has a 50% chance to ignore any damage from a corporeal source (except for positive energy, negative energy, force effects such as magic missile, or attacks made with ghost touch weapons). Non-damaging spell attacks affect incorporeal creatures normally unless they require corporeal targets to function (such as the spell implosion) or they create a corporeal effect that incorporeal creatures would normally ignore (such as a web or wall of stone spell). Although it is not a magical attack, a hit with holy water has a 50% chance of affecting an incorporeal undead creature.

An incorporeal creature's natural weapons affect both in incorporeal and corporeal targets, and pass through (ignore) corporeal natural armor, armor, and shields, although deflection bonuses and force effects (such as mage armor) work normally against it. Attacks made by an incorporeal creature with a nonmagical melee weapon have no effect on corporeal targets, and any melee attack an incorporeal creature makes with a magic weapon against a corporeal target has a 50% miss chance except for attacks it makes with a ghost touch weapon, which are made normally (no miss chance).

Any equipment worn or carried by an incorporeal creature is also incorporeal as long as it remains in the creature's possession. An object that the creature relinquishes loses its incorporeal quality (and the creature loses the ability to manipulate the object). If an incorporeal creature uses a thrown weapon or a ranged weapon, the projectile becomes corporeal as soon as it is fired and can affect a corporeal target normally (no miss chance). Magic items possessed by an incorporeal creature work normally with respect to their effects on the creature or another target. Similarly, spells cast by an incorporeal creature affect corporeal creatures normally.

An incorporeal creature has no natural armor bonus but has a deflection bonus equal to its Charisma bonus (always at least +1, even if the creature's Charisma score does not normally provide a bonus).

An incorporeal creature can enter or pass through solid object but must remain adjacent to the object's exterior, and so cannot pass entirely through an object whose space is larger than its own. It can sense the presence of creatures or objects a square adjacent to its current location, but enemies have total concealment from an incorporeal creature that is inside an object. In order to see clearly and attack normally, a incorporeal creature must emerge. An incorporeal creature inside an object has total cover, but when it attacks a creature outside the object it only has cover, so a creature outside with a readied action could strike at it as it attacks. An incorporeal creature cannot pass through a force effect.

Incorporeal creatures pass through and operate in water as easily as they do in air. Incorporeal creatures cannot fall or take falling damage. Incorporeal creature cannot make trip or grapple attacks against corporeal creatures, nor can they be tripped or grappled by such creatures. In fact, they cannot take any physical action that would move or manipulate a corporeal being or its equipment, nor are they subject to such actions. Incorporeal creatures have no weight and do not set off traps that are triggered by weight.

An incorporeal creature moves silently and cannot be heard with Listen checks if it doesn't wish to be. It has no Strength score, so its Dexterity modifier applies to both its melee attacks and its ranged attacks. Non-visual senses, such as scent and blindsight, are either ineffective or only partly effective with regard to incorporeal creatures. Incorporeal creatures have an innate sense of direction and can move at full speed even when they cannot see.