Mismagius is a very solid mon to build a team around. It gets a lot of different egg moves from the event. Perish Song can be useful for cheese as we all know, Destiny Bond for much the same reason, but Nasty Plot really allows Mismagius to become a pretty nasty sweeper once set up. Solid base stats mixed with a versatile movepool mean this mon can fill a whole lot of roles in a team, from Will-o-wisp support sets to Nasty Plot/Calm Mind sweeper. Or just 4 attacks. Mismagius may be overshadowed by a few other ghost types in game, but it's never let me down.