Guardians are also armed with six
converging beam cannon emitters,
[3] weapons commonly found on Forerunner
warships that emit tendrils of energy that track enemy vessels and create a path for antimatter streams to pursue.
[12] While six of these beam cannons were more than adequate to defeat the
fleets of primitive
capital ships, they were of little use when the Guardians faced Forerunner warships infested and captured by the Flood.
[3] However, the energy produced when multiple Guardians concentrate the beams of these weapons together is sufficient to destroy a planet in mere seconds by
cracking open its mantle and exposing its core, as seen in the annihilation of
Doisac.
[13]
