Indulgence of Conviction

Unnamed Flood Battlecruiser

The Unnamed Flood Battlecruiser was a Covenant warship that was captured and infected by the parasitic Flood, used in an attempt to infect the human homeworld of Earth.

Background
A former part of the Fleet of Retribution, it was captured by the Flood during the Sangheili's quarantine of Installation 05 and High Charity. Setting a course for Earth, it absorbed the ship's crew and passengers to provide biomass, it crashed into Earth near Voi, Kenya as the Prophet of Truth activated the Portal, and its new parasitic passengers spread out through the city, infecting the UNSC Marine defenders and the Covenant Loyalist occupiers. Its infected crew and the newly-infected "victims" quickly spread, threatening to overrun the UNSC's newly-gained ground, preferably the Factory.

The ship was originally going to be destroyed by John-117 and the Arbiter detonating its fusion reactors, in order to prevent further Flood contamination. The arrival of the surviving Fleet of Retribution made that unnecessary, and proceeded to instead Glassing the contaminated area. It is likely that the crashed Cruiser was the first target of the Sangheili fleet and was destroyed followed by glassed along with the the rest of the infected areas.