Going from the short description... this boy gets his wish... in a way... he gets teleported to Equestria and is welcomed by King Sombra and his queen... Queen Twilight Sparkle... and they ask him what he wants most and they will give it to him on one condition... he helps them rule Equestria... and agrees to this and will possibly become Equestria's greatest foe...
Will he see the light and show it to King Sombra and Queen Twilight? Or will Equestria still fight to the death against another new foe? If so... will they win or will they lose?
(This goes off of chapter 6 of The Path of Damnation)