Its a modal tutor that ends the game, and its utterly busted
#6: Yavimaya, Cradle of Growth Urborg, Tomb of Yawgmoth is a card that has seen a lot of play over the years
Three all at once means they all have a steep climb to being expensive
Guzzlord GX is a very interesting card with the "Eat Sloppily" attack that can in theory attach 5 darkness energy to Guzzlord GX

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