When transmogging was first introduced to WoW there was an exploit that was going around where you could transmog an item on your main to a non level required quest item and send it away to an alt, the alt could then use this item and the transmog apperance would stick. This exploit has recently came back to live servers with the prepatch launching, but its slightly changed.
Now instead of having to send the transmoged item from your main to your alt you can just transmog it on your low level character as long as the quest item doesn't have a requiered level to use that item even if the quest got a level requirement to pick up.
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