Medallion of elemental summoning

Medallions of elemental summoning were magical items that could be found in Zakhara, the Land of Fate.

Description
These magical items were golden medallions with a stone inset depending on the type of elemental it could summon: blue for water, brown for earth, red for fire, and clear for air.

Powers
Any type of person could use these medallions to control a powerful elemental for up to one month at a distance of up to half a mile (0.8 km). Detailed instructions needed to be given to the elemental. The medallions could not be used more than five times.