Colosseum Vault Key
The reward for completing all 18 arenas of the Colosseum within one hour. It opens the Colosseum Vault which holds Black Marrow Reliquary grade loot plus a random ring (Red Empyrean Ring, Blue Empyrean Ring, Yellow Empyrean Ring, White Empyrean Ring, or Green Empyrean Ring).
Note: While the key is attuned and bonded you can can open to the chest and then let someone else loot it hence they are tradeable in a way.
