Hidden Arsenal was released in November of 2009. The set included 30 cards, and every pack inlcuded 1 Secret Rare and 4 Super Rares. This set showcased the first release of Brionac, Mist Wurm, and Ally of Justice Catastor. All 3 made a large impact on the format of the time. To this day Brionac is banned in competitve play.
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