Ability - A measurement of a character's sanity, categorized as Senses, Willpower, and Nerves. When first cursed by the Manor of Sleep, a character must assign point values to these ability scores. Abilities' point values decrease as a character explores the Manor of Sleep or encounters hostile ghosts.

Ability Check - A check made determine general success of most actions. These typically do not deplete ability scores. A save is a type of ability check (see below).

Blue Lantern - An entry/exit point that allows cursed characters voluntary transit between the Manor of Sleep and waking world. Upon leaving, a character must spend time in the waking world before reentering. Characters may not enter the Manor of Sleep using blue lanterns they have not touched.

Cursed - A character who is possessed by the Tattooed Curse. This curse is bestowed by Reika Kuze upon all who visit the Manor of Sleep. Only cursed characters may enter the Manor of Sleep. Cursed characters experience disturbing hallucinations in the waking world, typically haunted by the spirits they have encountered in the Manor, and exhibit obsessive symptoms towards information pertaining to the Manor.

Dream Sequence - The extended period of time a cursed character spends within the Manor of Sleep. A dream sequence lasts until the character expires or uses a blue lantern.

Dream World - The realm of dreams, particularly the space occupied by the Manor of Sleep. The dream world is typically accessed by sleeping, and can be left by waking up.

Expire - When a character who suffers damage with all three ability scores at 0, or is struck by specific ghost attacks. Expired characters disappear from the Manor of Sleep and awaken; in the waking world, the tattoo spreads over their bodies.

Feat - An action that accomplishes something amazing. These are based on a character's abilities, and are automatic successes; however, they usually expend a single point. For example, shoving a ghost away with sheer force of will is a feat.

Ghost - Any spirit of a dead individual drawn to or trapped in the Manor of Sleep. Some ghosts are hostile, others are not.

Hostile - A malevolent ghost that attacks characters, depleting their ability scores. The Camera Obscura's filament glows red when hostile ghosts are present.

Immobile - When a hostile ghost's attack leaves a victim unable to move. The victim can typically still take actions, including making a save to break free.

Memento - An item of personal significance to a ghost, usually keepsakes or fragmented records of their life's memories.

The Rift - A swirling vortex of negative energy residing between the worlds of the living and the dead, filled with the feelings of pain and loss that linger between the planes. The Rift is an elemental force, often warping the spirits trapped within it into malevolent wraiths.

Save - Making an ability check to stop an ongoing effect such as stunning or immobilization.

Sensitive - A victim with a connection to the supernatural realm, such as psychic or mystic individuals. Sensitives are susceptible to specific attacks.

Stun - When a hostile ghost's attack leaves a victim unable to take action. Stuns typically last one "post", preventing a character from taking actions unless they can make a save.

Victim - The target character of a ghost's attack.

Waking World - The material and mundane realms outside of the Manor of Sleep, particularly normal roleplaying threads.