It would feature a world filled with miasma, have bangaas, vieras, moggles, humans, yukes. It would have been made by a kid from the real world. Everyone would have a adventurer's card with which says their class, and how strong they are. Earl Tyrant would rule the world from a tower in the middle of the world. Black mages and White mages would be fighting a political battle of morals. The theif guild would be mistrusted everywhere. There would be 4 really big crystals, that control every element, and their hotspring for your chalice (Oh yeah, you have a chalice). 4 new elemental lords would guard the crystals. Kain and Cecil would guard the unknown element, which is on the same island as Earl Tyrant's tower. Raem would be trying to kill Tidus. Kids from all over the real world would be in the Final Fantasy world. Shadow, Sabin, Edgar, and Gau would be trying to kill you, because Earl Tyrant has control over them. Other characters would become part of their class's guild, and try to stop these 6 ex-seroes. You would eventually save them, have their help, and defeat Earl Tyrant.
My point? Dispite the fact that you try to use a good name, like final fantasy, unless you have a good idea, this game, and any knock off games like this, would fail miserably.
Discord
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