If you use Dimensional Ripper - Area 52 - Item - World of Warcraft or one of the other engineering teleports you sometimes will end up with a debuff. All the debuffs will stay on even in arena.
If you manage to get Soul Split: Evil! then you will become faded and look a lot like a shadow priest. Also in ring of valor since you are larger you can jump over the gate before other users can.
Here is a screenshot of it in arena..
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