Something stirs in the confines of a muggle research facility, something that only has one thing in mind, the extermination of the human race. Harry Potter must do the one thing unimaginable, he must ally himself with the Dark Lord.

The Otherworld the world that connects all worlds together, has long been controlled by the light, but a darkness comes and begins to merge worlds together, one world at a time. The world being merged? Earth. HP massive crossover.