Sylv being in the Lost Box colors could be a possibly playable answer to stage 2 decks. Obviously, they'd see it coming cause of eevee but if they can't answer it and they burned or prized a rare candy somewhere it it could be decent. Also it has funny meme potential with Iron Valiant ex and Glimmora ex in that you can force the Terrapagos player to lose 7 benched mons (8 with enough switch cards to stack bitties lol).