A figure in a not dark room looked at the screen of his laptop. He had made false memories that would hide the real memories of the pony. If someone was to see his memories they would only see the false ones. He had gone out of the way to add emotions and edit this version of Equestria with his limited powers to make the events and identities seem real.
All that was left was to upload these memories to the pony. He still hadn't heard from fifth-dimensional version of him which was suspicious. He looked around the world to see if something was left to be done. Seeing nothing, he scheduled the download to start when the pony sleeps. He closed his laptop as his work was done.
Unseen by him, a power appeared in the world undetected. In the caves of Canterlot, a machine resembling an arachnid from a tale written by the true author that wasn't told yet was placed by the fifth-dimensional. The machine had only one objective.
'They must suffer.'