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buy a "Scroll of Purification" from the store for 5 coins

I just transmogged Claw of Molten Fury to both my main hand and offhand but the offhand didn't mirror properly and looks bad. When I used wowhead dressing room and 2 x Claw of Molten Fury it looked...

I am in the U.S. and used a Subway card just fine (3 separate times). I was sketched out at first but it works totally normally.