Everyone's after it... the elusive [Arena Grandmaster]. Requires 12 [Arena Master], obtained from the Gurubashi Arena. Now, it's quite obvious that both faction can get to you in the arena, and the only way to stop anyone from killing you in there is being in a group with them. Right? Right? Wrong. There is a way to unflag yourself for PvA, meaning your faction won't be able to attack you. And get this, it's as easy as leaving the Battle Ring and reentering before your unflagged. If you do that, the timer (of about 15 seconds) will run out after you re-enter the Battle Ring, unflagging you. Your faction cannot touch you. Here's a small guide to ninja the trinket from your own faction, easily:
1. Die
2. Corpse run back.
3. Leave the ring and reenter.
4. Wait until you're unflagged.
5. When the chest is spawned, quickly resurrect and loot it, fearing only the opposite faction. If none exist in the arena at the time, GG.
Important Notes:
You can be easily reported for this.
It is seen that you are PvA unflagged.
You will be PvA flagged upon logging in to the arena.