“The infection of which you speak is known as the Flood. A biological menace that saw to the demise of my creators. – The Forerunners.” 5439 responded. “The attack has gone on for too long, the infestation will now be attempting to construct a Proto-Gravemind! If they are successful, the intelligence of the Flood will increase tenfold. – Transmitting optimal location for Gravemind construction.”

Across all devices, a layout of Union Station would be downloaded and a waypoint that directed everyone to somewhere in the centre of the station would be displayed.

“The Ethereal is correct. The Sol-Drive must be destroyed, however, ensuring the Proto-Gravemind is destroyed in number one priority. My sentinels shall clean up the minor outbreaks. All specialists should focus on the Sol-Drive and/or the Proto-Gravemind.”
As the comm cuts off, the ship that had entered the system began to glow as all its external ports began to open, allowing the internal lights to shine like a beacon in the void of space.

Then they went dark.

Millions upon millions of [url= https://vignette.wikia.nocookie.net/halo/images/b/b6/Halo_Wars_Sentinel_Transparent.png/revision/latest?cb=20111113205640]sentinels[/url] began to swarm like a plague of locusts towards the station with terrifying speed. As the reached the station, they split into many groups and coordinated attacks on all the Flood forms, using their central beam to burn them into ash.