Wildfire
Wildfire is a plane of flame and lava, home of many Djinni and Efreeti, and ruled by the Emberwilde Caliph, and the Emberwilde Order. It maintains trade with several of the Rabiahs and Suq'Ata, on Dominaria through the use of several naturally occuring portals that can be found scattered throughout the deserts.
It is said that the beings of Wildfire are responsible for teaching the goblins of Dominaria how to harness fire magic, knowing full well that they would be unable to master the gift.