Ultraman: The Elder’s Power, Now Let Me Teach You

Thirty million years ago, Dark Lucifer and Dark Lugiel joined forces to take control of a human's body and unleash the Dark Spark wave. But with the Galaxy present, their most powerful Spark wave failed. Taking advantage of this, Dark Lucifer and Dark Lugiel allied with Reiblood to revive the monsters and aliens across the universe who had been defeated by the Ultra Warriors. However, their plot did not escape the notice of the Mysterious Four Ultras. With help from Ultraman King, Ultraman Zero traveled to various universes and gathered the defense forces and human hosts from across the Ultra universe. After sending away all the uninvolved humans and researchers, they fought a cataclysmic battle on Earth against the army of monsters led by Dark Lucifer. After the battle, both sides were left badly wounded. Once humanity found a new home, they placed the Spark Legacy Stone atop the Spark Tower they had built, turning it into a second Land of Light. Three million years passed in the blink of an eye. Now, due to overpopulation, Earth has been forced to expand into the wider universe. Humanity settled on another suitable planet, the Earth of the former defense forces and Ultra Warriors. As the age advanced, the entire Milky Way came to be divided among three major powers and various smaller factions. The three great powers are now humanity, who possess the Ultra Warriors; the Dark Nebula, ruled by Dark Lucifer; and the Galactic Empire, ruled by Reiblood, who took over Alien Empera's body.