The KeyForgecardpool grows and expands once more with Mass Mutation, giving you access to billions upon billions more completely unique decks—decks with their own strategies and tactics that only you can truly master. Drawing from a cardpool of 422 cards, Mass Mutationbrings over 250 brand-new cards to your decks, and with the introduction of dark æmber, mutation runs rampant. You’ll find strange new versions of familiar characters, massive creatures that stretch across more than one card, and the triumphant return of House Sanctum.
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