Humans... made to be the image of the gods. This was a mistake. Humans had little of each god, even the bad ones. So, because of this, humans killed each other until there were no more humans. With just one man and one button, it started the apocalypse. When the first Nuke hit, twenty more came a day after. Then more the next day. Then bioweapons were released. In the end, every living thing on Earth had died. This caused the God of Death, Mazuis to awaken. He knew that the Gods needed waking, Earth was their source of power. They would need to recreate the Earth, this time without humans. Instead multiple sentience races. The work now began.
In the Beginning, there were 12 Elder Gods. The Elder Gods however made many mistakes, causing the death of most of them, however there was one that outlasted the others. He of course died, but before he died he created a new pantheon. This new pantheon saw the mistakes of the Elder Gods, they had not created a place to help produce all their power. The new gods used up most of their power creating Earth, and life on it. With this the New Gods, went into a long sleep to gain power and return one day to rule their domains.
However, this was ruined when the humans war-like spirit, haughtiness, and arrogance got the best of them. They had always had war, but this war escalated to be the true war to end all wars. Once the nukes launched, and the radiation spread, not a single form of life was left.
Now the New Gods must recreate an eternal power source so they will not perish like the Elder Gods did. They are weak but still have small sources of power. They must use these sources to create more to sustain themselves.