Cyclone (Final Fantasy II)

The Cyclone a whirlwind that the Emperor has unleashed to destroy the town of Fynn. It has already ready destroyed the towns of Altair and Gatrea which is why you can't enter them anymore past this point. Firion, Maria, Gus, and Ricard fly the wyvern into the vortex and must work their way to the top. At the top awaits the Emperor. On their way up they encounter monsters that have been sucked up by the vortex. Once they reach the top they encounter the Emperor. He sends a few teams of Royal Guards before you get to fight him. After a few battles the Emperor attacks. After the battle the Emperor dies but its not the end. After you get the airship you travel to Castle Palamecia, there you will see him again, but he has come back from Hell.