Apart from its original printing in 1999s Urzas Legacy , Defense of the Heart has only ever appeared in Mystery boosters
8 Duke Ulder Ravengard Myriad And Aggro - Name A Better Pair There's a long-running joke that every red-white deck in Commander is an aggro deck without deviation
Mainly because they can be cast on the first turn, before our earliest opportunity to cast a Reunion effect, and secondly because of the possibility of a turn three one mana card + Reunion sequence
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All three of the Phyrexian Preator cards in recent sets have been very good cards
So, how am I gonna feel good about playing down some totally normal, average, everyday trainer knowing that next turn Im gonna get hit with THIS