Harbinger of Extinction

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"It cannot be stopped, I've seen it myself! His ship- it's massive, bigger then entire cities! It's hopeless! I've see the UNSC try to stop it - and their attempts just rippled it's shields!"

- A panicked civilian, on the Harbinger of Extinction.

The Harbinger of Extinction was an immense Durom-pattern OSS-class dreadnought that served as the flagship for Xytan 'Jar Wattinree. Once thought to be the largest warship ever constructed by the at the time of it's discovery, the Harbinger was commissioned specifically to lead the  against the. Second only to the Hegemony's in terms of shielding and raw firepower, the Harbinger was unique in that it's main gun was recently reversed-engineered from a  artefact, unleashing unimaginable destruction on it's opponents.

Commissioned by the previous triad of, the Harbinger was assigned to lead the during the early portion of the war. Responsible for the destruction of dozens of colonies and hundreds of warships, it would become the symbol of the Covenant's inevitable victory. It was with it that Xytan would earn the nickname of "the World-Killer" among humanity, as he used it to personally reduce numerous population centres into melted glass. Entire fleets of warships could be perished against it in a single battle.

Unfortunately, it's brief service to the Covenant would eventually come to an end when Xytan was exiled following the disastrous, when over three hundred ships were instantly destroyed by the after it turned the gas-giant into a shortly-lived star. The Harbinger would be offered to Thel 'Vadam to command, however he would turn it down due to it's lumbering size proving to be difficult to use in a fight. Left in the dockyards of, the Harbinger would remain there even when the would ignite, and would subsequently be lost when the city-station collided in.