The Feymarch, also known as the Land of Monsters, Land of Summons, or the Phantom World, is a location from the game Final Fantasy IV and Final Fantasy IV: The After Years. It is located in the Underworld, and it is here where all Eidolons live. The Dwarves of Tomra to the Southeast call this place "The Land that Lies Between". The Eidolons are guided by their queen Asura and king Leviathan.
Due to the immense magical power located on the Summons' plane, time flows faster in the Feymarch. The town in which the Eidolons live is guarded by the Passage of the Eidolons, a cave filled with lava, and only those with the Float spell can bypass the lava and reach the Feymarch; crossing it without Float will cause HP damage. Rydia was brought to the Feymarch when Leviathan attacks a ship she is traveling on, and matures very quickly under the watch of the king Leviathan, after which she is sent out to help defeat Golbez.
After obtaining the Falcon, Cecil and his friends can travel to the Feymarch. There, they can interact with many of the land's denizens and fight Asura and Leviathan. After the Queen and King are bested, they will become available for Rydia to Summon.
In The After Years, in Rydia's Tale, the Mysterious Girl comes to the Feymarch to take the power of the Eidolons, Rydia was saved by the King of the Eidolons and so she could go to the rest of the Underworld to warn the Dwarves.
The Feymarch is now located within the world of Gaia, though, there has been small white orbs appearing in strange locations around the world, once one touches it, they will be taken within the Feymarch. Surrounded by lava, the island sits out in the middle of massive mountains and is very well hidden, only by air is it accessible..
