A League of Legends Crossover.
Mordekaiser, a fabled champion of the League of Legends known for manipulating pain for his own benefit and his enemy's downfall. Portrayed as a frightening being covered from top to bottom in sharp metallic armor while wielding a giant spiked mace as if it were nothing. So it makes sense why his arrival into Equestria through an error in the recalling system might make some ponies uncomfortable. They should be, because he doesn't like this place one bit and wants to go home at any cost.

Either he can be granted the penance of returning to Summoner's Rift to inflict his torment upon his enemies or he could stay in Equestria and do the same thing. Would that be enough reason to get the Kaiser of Morde back to where he belongs?