Key of Osanalan
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The Key of Osanalan is a Forerunner object underneath the city of Cleveland, Ohio on Earth. [1] As revealed by a captured Colonel James Ackerson, without the Key, the Halos will not properly activate. Outside of Halo: Uprising, no mention of the key is seen in Halo 3, and Master Chief activates the replacement Installation 04 successfully even without the key. However, the key could be required for a full Array activation, but not for single detonations, as a sort of stop-gap measure to insure the galaxy is not wiped out by accident. Or, the key could likely be the activation index for the portal, which would explain its location on Earth and not a Halo ring. Also one of the main characters in Uprising, Ruwan knows exactly what it is.
(NOTICE FROM ANOTHER AUTHOR- This entire article is incorrect. to begin with, the "Key" is only known as the activation index. But furthermore the Key is entioned in halo 3, as cortona has copied the codes from the key, and so she can activat any size halo array detination without the key, or at least that of Instillation 04 should activiation codes vary between Halos. And it is with this that cortana was used to activate the replacement instillation 04 against the command of 343 Guilty Spark.)
(As for this article itself, i know not what to do with it, as it could not be repaired without becoming a stub. So i leave it for a more experienced person to edit back to condition.)
