Don't fall into the trap of calling counterfeit cards proxies because it helps normalize their use in the community and reinforces their acceptability, which is a bad thing for the game, its players, local game stores, and Wizards
This must be at least the casting cost of the card
Essentially a double Goblin Lackey (#9 on this list), the presence of double strike and a mythic rare rarity make this creature incredibly hard to find
So he can very quickly become an even bigger threat
Youll require two undying creatures in play, sacrificing the first to put a -1/-1 counter on the other, effectively resetting the +1/+1 counter from the undying mechanic
Since figuring out which of these decks is which can be a little time consuming, heres every duel deck with its corresponding expansion symbol: Overwhelmed