Seiken Densetsu 2

Using the power of Mana, civilization has grown strong. In time, Mana was used to create the ultimate weapon: the Mana Fortress. But this angered the gods and they sent their beasts to destroy the Fortress. A violent war between the beasts and the Fortress plunged the world into chaos, and Mana seemed to all but disappear. Before all was lost, a hero wielding the Mana Sword smashed the Fortress -- civilization had been destroyed, but the world was peaceful again. But time flows like a river, and history repeats...