Alexander J. Mercer. The Prototype.

His job was clear. Stop the military from achieving their goal. Wiping Manhattan off of the face of the Earth to eradicate the Blacklight virus.

Sounds simple enough, right? What about him getting sent to a completely different reality with talking horses?

Yeah, not so simple when you put it like that.

Meanwhile, an old, evil entity vows to make its return. How will Mercer fit into all of this?

My attempt at a prototype/MLP fanfic. Let's see where this takes us, shall we?