Mercury Shrugs

Four years after the destruction of the planeport, Earth remains cut off from Heaven. The angels and demons are in disarray, lacking direction and leadership. Someone has to step up and take control, and that person is... Mercury?

But when the demoness Tiamat finds out about Mercury's plan to reestablish contact with heaven, all hell breaks loose. Mercury finds himself at the center of a plot to rewrite Earth's history, and the only way to stop it is to travel back in time to prevent the plot from coming to fruition. Along the way, he accidentally travels to multiple parallel universes, meeting several alternate versions of himself and tearing a gaping hole in the fabric of reality.