An item retrieved off the traitor messenger's corpse, sealed with the power of a Circle Mage, only another Circle Mage could open it. It was given to the messenger by the Dark One and was purported to hold the invasion plans for the leaders of the Black Fist. In actuality, it was a trap set by the Dark One. When Rohen opened the casket, a magical trap immbolizied him, at which point the Dark One killed him.