There's a case to be made for any of them, and we've had the pleasure of testing not only Silverquill, but the Quandrix Unlimited and Prismari Performance decks, too

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On the other hand, their collectibility and scarcity have led them to be a bit more valuable on the secondary market
I am surprised they would go for $300+ as even with little background that is risky, especially since it seems like that would be easy to reproduce
Last year we got Unlikely Aid