I'm legitimately upset that Reset Stamp is a thing. N was already annoying in the late-game, but he had two major factors balancing him. One, he also forces the user to shuffle their hand away, which becomes a double-edged sword if the user's taken some prizes. Two, he's a Supporter, so not only is he limited to one use per turn, he also has to compete with whatever other Supporter the user has access to that turn. Reset Stamp sees neither of these downsides: it doesn't cost you anything to use, and you still get to use a Supporter. The only "balancing" factor this card has is that it's not good early-game, but that's hardly sufficient for how broken it is late-game.