At the edge of Equestria their stands a tower. A tower containing weapons from a time before ponies; when a warring species fought itself to extinction. Nopony who goes near the tower ever comes back alive; until now. When Princess Twilight Sparkle finds an artifact that grants her access to the tower she will discover the terrifying truth about the tower. There's one of them left. He wants the world, and he's not afraid to take it.