See also: The Hawke's Key

Codex text

The key is, and always will be, part of the cage that holds Corypheus. The prison's power is tied to that of the key; as the power of one waxes, the other wanes.

The key's origins are lost to time. All we know is that it is an ancient, powerful weapon. The Wardens of old uncovered a few of its secrets—just enough to draw upon its magic to create the seals that hold Corypheus.

Accounts indicate that the key attunes itself to whichever man or woman wields it in the rituals that reinforce Corypheus's chains. It is the nature of the magic, something in the blood. The key is currently attuned to one Malcolm Hawke, the last mage to hold it.

The key is an essential part of strengthening the seals, and also the only thing that can break Corypheus free.

—From Janeka's research notes

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