Weirdway (Keys to the Kingdom)

Weirdways are a method of travel in the fictional The House of The Keys to the Kingdom series by Garth Nix. They seem to exist in many rooms and levels of the House. They are often disguised as something (according to Suzy Turquoise Blue, the most popular are mirrors) and are activated by touching the object they are disguised as, transforming the object itself into a "dark doorway" which leads directly into the Weirdway.

According to Suzy Blue, Weirdways are composed of Nothing and exploit the architecture of the House. Weirdways have corridors that have dark walls that are soft and jellylike (probably the reason they are called weirdways) and may be short or long, depending upon the distance of the place to which they lead. If a Weirdway closes while a traveler is still within it, it is assumed that that traveler is either "squashed" or ceases to exist. Some places, such as the washroom in the Great Maze, simply cease to exist once the Weirdway connecting them to another part of the house has shut, expelling all lifeforms of the place to which it connects.

Weirdways, when disguised as something, are immovable and cannot be carried around the House as a portable "teleporter" (e.g., a Weirdway disguised as a coin on the floor cannot be picked up and carried, to open the Weirdway whenever it is convenient; it is simply stuck to the floor).

So far, the only way known to close a Weirdway is the blood of a trustee. Any matter inside the Weirdway when both entrances shut is destroyed or expelled.