Poltergeist

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 is immune to all nonmagical attack forms. Even when hit by spells or magic weapons, it takes only half damage from a corporeal source. Although it is not a magical attack, holy water can affect incorporeal undead. Corporeal spells and effects that do not cause damage only have a 50% chance of affecting an incorporeal creature. Force spells and effects, such as from a magic missile , affect an incorporeal creature 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 objects, 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 within a square adjacent to its current location, but enemies have total concealment (50% miss chance) from an incorporeal creature that is inside an object. In order to see beyond the object it is in and attack normally, the 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. An incorporeal creature's attacks pass through (ignore) natural armor, armor, and shields, although deflection bonuses and force effects (such as mage armor ) work normally against it. Incorporeal creatures pass through and operate in water as easily as they do in air. Incorporeal creatures cannot fall or take falling damage. Incorporeal creatures cannot make trip or grapple attacks, nor can they be tripped or grappled. In fact, they cannot take any physical action that would move or manipulate an opponent 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 Perception checks if it doesn't wish to be. It has no Strength score, so its Dexterity modifier applies to its melee attacks, ranged attacks, and CMB. Nonvisual 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.

This ability is constant—the creature remains invisible at all times, even when attacking. As this ability is inherent, it is not subject to the invisibility purge spell.

Once per minute as a standard action, a poltergeist can temporarily drop its natural invisibility, revealing itself to be a skeletal, ghost-like humanoid. All creatures within 30 feet when a poltergeist uses this ability must make a DC 14 Will save to avoid becoming frightened for 1d4 rounds. The poltergeist then resumes its invisibility at the end of its turn as a free action. A creature that successfully saves is immune to the fear effect of that poltergeist for 24 hours. If the poltergeist's natural invisibility is negated via other methods, it cannot use this ability. Likewise, those that can see invisible creatures are immune to this special attack. This is a mind-affecting fear effect. The save DC is Charisma-based.

A poltergeist cannot travel more than 120 feet from the point at which it was created or formed.

A poltergeist has no method of attacking apart from telekinesis. This ability functions as the spell telekinesis, with a CL equal to the poltergeist's Hit Dice (CL 3rd for most poltergeists). A typical poltergeist has a ranged attack roll of +3 when using telekinesis to hurl objects or creatures, and can use the ability on objects or creatures of up to 75 pounds. If a poltergeist attempts to hurl a creature with this ability, that creature can resist the effect with a successful DC 12 Will save. The save DC is Charisma-based.