So, I am trying to figure this out, but I think I need some outside help/confirmation. When a unique card is duped, a player may trigger a Response effect to discard the dupe instead of the unique card leaving play. My question is, where is the Response effect? Is it gained by the original card, is it gained on the "duplicate card" or is it a free-floating Response with no affiliation with any card (that is, does any card gain the actual Response)?