Meet the following conditions to unlock the following card backs.
Card Back | How to unlock
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Fireside Friends | Play 3 matches against other players on the same subnet (local network), while at least 3 players are signed in on that subnet.
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Legends | Reach Legend rank in Ranked Play mode in any season.
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Pandaria | Reach Rank 20 in Ranked Play mode in April 2014.
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