Mass Effect Universe vs All Final Fantasy universes except for 13 (explained)
In Mass Effect time, scientists are experimenting with wormholes when they accidentally make one to the FF universes minus 13 since it isn't out yet and is an unknown. Then for some reason they decide to fight because the FF universes want to destroy the Mass Effect universe...sorry, don't have time to make a better story...
This is an ARMY vs ARMY battle, characters are allowed too except for omnipotents/near omnipotents (if there are any...)
Who wins?