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.
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.