Time and Space Rings

During the Chosen Change thousands of years ago, the alliance between humans, elves, dwarves, and dragons defeated the alliance between the demons and high elves, goblins, and trolls. Now, the aliens are about to invade again. However, the Odin Empire is suffering from internal and external troubles - the Northwest Legion and the Noble Legion are rebellious; the Vesco Empire in the east is ready to move, and the southern prairie cavalry is gearing up. Coupled with mankind's original unstable alliance with the elves, dwarves and dragons, how should mankind respond to the second change of God's Choice? This is the story of a magician who cannot do magic.