A tool used to open passageways between Dark Atlantis and other worlds. The most well known are those used in the merchant Zypherships, which provide transport of people and cargo to and from the material plane.
As of today only twelve of the original Zyphers remain, the rest having been destroyed or lost over the centuries. Due to this scarcity they are considered nearly priceless, as Dark Atlantis heavily depends on trade for its food, precious minerals, and iron. Ever since the Monstrous Riots, meddling with Zyphership trade has been viewed as bad form and is strongly discouraged.