World of Sharr
Calling is the ability to summon an intelligent creature or item to the Wyser from across some distance. While this could be as simple as calling someone from across the street, it is more often the case that these entities are brought from across other worlds or even other planes of existence. However, a Caller may not simply bring anyone or anything she simply knows about to her location. The Wyser must first discover and establish a Contract with the creature or item. The specifics of a Contract vary from case to case, but the common themes are that, in return for some service or payment to be rendered while the summon is still active (i.e. the creature or item has not yet been returned to its home), the being will do as commanded by the Caller, the Caller will provide the being with the Manna necessary to perform such special functions as the being sees fit, and often times, the being will leave caveats that will not force it to answer the Caller should the being deem appropriate.