Silver Thread

Silver Threads are constructed from Magic. The act as short-term Portals and can be opened to any location on the receiving dimention.

Use
Until the rise in Magic use after Devri's War, Silver Threads were very rare, as the energy to open and sustain one is more than one mortal person can supply. They are unstable at best, and can collapse at any time, though more energy supplied from the entrance generally means more time before they break. if this happens while someone is inside them, that being is exposed to the Void, which the Threads move through, and ceases to exist.

Once opened, energy for the Thread is supplied mainly from the Void; this same Void, however, created pressure on the outside of the Thread, eventually causing it to "crack" under the pressure. More energy given from the outside extends the life of the Thread, as it powers it without pressing in on it. Unless more than two people power a Thread, it is usually unsafe to send more than one being through before making a new Thread, as breaking time is unpredictable.

However Threads can be quite stabilized if enough energy is given. Devri used copious amounts of Power Stones and Destroyer his Fanatic army to keep stable Threads to the Nebulos.

Threads cannot reach as far as Portals, and Cannoraoul/Cythrawl cannot be reached from any known dimention by Silver Threads, probably because it is too far away in a fourth-dimentional sense. They are currently the only way to reach the Halfsteps (with the exception of Dreamscape with its Gateway).