- last post: 01.01.0001 12:00 AM PDT
It most likely is Gravemind. He hacked into Halo and High Charity, and made a pinpoint slipspace jump inside High Charity. In fact, that jump was impossible. Cortana needed all the sensors on an advanced Covenant ship to jump in an atmosphere. Gravemind did it with a broken-down cruiser.
Cortana would have said its an AI, because she didnt know a living creature could be better with computers than she was. Gravemind initiated a "100,000 years war" with the sentinels, even though all his combat forms were probably dead. He grabbed the Monitor, and was probably only contained because infection forms suck against sentinels. Then the Covenant show up, and in a few days at most he decimates the Forerunner machines, the humans, and takes the holy center of the Covenant Empire. The man is a genious.