>>54509029From your opponent's discard obviously.
>>54509487Keep in mind you can only attack once per turn, so spending that attack on drawing cards instead of taking a ko is actually awful. Especially since you have abilities that draw cards without taking your attack for the turn, like Kirlia. And that's precisely why mischievous lock is good: it prevents the opponent from using abilities he needs for his deck to function properly. Using Hatterene V's Teleportation Burst and switching into Klefki can be a real pain in the ass for some decks.
