I think the one of my most potentially combo breaking or fun card is going to be Blatant Decoy. Just think about it. Jepetto makes your big boys cost 1. Decoy puts them into play. So if you can figure out a way to abuse this or combo out, this is potentially really strong.
If it's already a 1 mana cost card... you would just play it. Why would you need to cheat it out with Decoy?
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If it's already a 1 mana cost card... you would just play it. Why would you need to cheat it out with Decoy?