Erhnamgeddon has been around since back in the days and the game plan goes something like this: start by developing your mana base with Fellwar Stones, Moxen and Birds of Paradise, play a big creature like Erhnam Djinn or Serra Angel and then blow up the world! Or more correctly blow up all the lands with an Armageddon so the opponent will have a hard time answering your threat.
Meanwhile the Moxen, Fellwar Stones and Birds of Paradise keeps you able to continue playing the game even after the Armageddon. You can also add blue for power and some control elements, then the deck sometimes is called Bantamgeddon.