*I own neither the copyrights to the Duel Masters game or the cards, and if anything matches to the real world, it is only a coincidence, thank you.
Prelude
No one knew how it began, but it was such in the beginning that the fortress Original Heart gave birth to the Original Gods. They dwelled within the walls of this impregnable magnificence until the day when they grew tired and sick of their confinement, their only home. Thus they sent forth their most worthy servant, Saga, the Creator to scour the lands before him, to seek followers, and to spread the influence of the gods.
With a golden blade in hand and two of the greatest entity other than the Originals themselves, Aku and Zen, they made their way through the still chaotic realms of the world. Their arrival was a spark of a massive chain of reaction. Chaos reworked itself, and different realms restructured themselves. Creatures were born, and they formed their own groups where these groups grew into races. Slowly but surely the races gathered on basis of similarity and cohesiveness. Colors came into the world, and painted five hues across the world, yellow up in the heaven's, green where trees grew, blue were water pooled, red where fire burnt, and black in the abyss deep bellow. One by one, the Saga and the gods visited the five, gaining colors of their own, while trying to convince them to join their cause, their cause to rule the world.
Because of their great statue, some submitted to their glory, but still many refused to obey, and either fled or threatened battle. At first Saga ran from these ensured conflicts, as his job was not to make war but only to make plain the plans of the Original Gods, but when the numbers of the followers gathered were painfully small (as none desired to lose their freedom), Saga was forced to exercise his power for the first time. Using God Saga to create more gods of their own likings and Violence Heaven to clean off obstacles, while having Earth Eternity Gate giving raise to those gods who had past away, the followers of gods grew rapidly, as fast as a wild fire enjoyed an ancient forest. Saga, the Creator, made sure that he visited every race there was, and when he saw fit, moulded them into one of their own.
Suddenly every race found themselves in power struggle as the gods swept through the lands, conquering everything there was. Alliance were made and wars arise from stern oppositions from the races, but against the gods they were no use. Even when all the Armored Dragons, a proud race, saw to that their every members turned against gods, they were still unable to turn the tide of the battle...until when the world was ablaze in the fire of war, that one race arose from it—the Phoenix.
These mythical birds all morphed from other creatures, raising from the ashes of their body into the battle field. Of them all, the one that reigned over the rest, Ultimate Galaxy Universe, led the gods' oppositions to series of decisive victories and pushed the gods back into the shelter of the first fortress, the Original Heart. Victory was at hand, but when Atom, the Divine Core, the one that held the five other Original Gods together, appeared in midst of the siege and linked with the other five, nearly all was lost. The struggle was fierce and results devestating, but still the Original Gods would not bulge an inch nor will the Original Heart fall. Nothing can remove them...or so it seems.
The Armored Dragons slowly took command over from the phoenix as their numbers dwindle nearly to extinction, and then evolved into the Lunatic Emperors. There was Rising NEX, the Enlightened, a slayer of gods, but that was not enough. It was until the armies of the abyss, the Demon Commands and Dark Lords came that the true ultimate evolution arise. Romonoff Kaiser NEX, the first Lunar Sun's Kaiser, perhaps the strongest creature ever to exist, met the Original Gods in battle. Triumph finally was at hand, as Romanoff Kaiser NEX overpowered the first gods in a deadly duel, but the Original Heart did not wish to fall. In its final moments, it gathered all its strength and belched destruction on all.
Everything as it was known shattered. Nothing were left, only layers and layers of remains, so called Remnant, by modern day archeologist, covered the world, and as time flew by, was buried deep under the ground. All seemed well as live once again thrived, this time dominated by powerless Mammalian creatures who called themselves Homo Sapiens, or Humans for short. They spent happy years above ground, exploiting everything they had around them. When that was not enough, they so naively began to exploit what is under their feet, and when the Father of DM-ology, Dr. Musou, stuck his digging machine nearly 3 miles into the ground, humans first came in contact with the ancient ruins. In their foolish delight, the humans adored the ruins, and very soon, began to piece the pieces back together.
What they didn't know was that Original Heart was never destroyed. True, it was shattered, but its spirit lived in pieces, bearing a slowly accumulating hatred for all things alive that were undivine. The world needs to be cleansed, and cleansing comes through destruction of all mundane creatures.