dur
The Covenant's arsenal in the games is comprised primarily of plasma- and energy-based projectile weapons. In Halo: First Strike it is revealed that the weapons are based on Forerunner technology. Halo's plasma weapons contain a battery that generates plasma and discharges it at a target. Frank O'Connor of Bungie.net claims there may be something more to the Covenant's weaponry. He has been quoted in Bungie.net's boards saying: "The actual technology is not plasma as we know it, but something far more dangerous, arcane, and destructive."
I wonder...damned O'connor!