Decimator-class Veilship

The is a heavy warship classification used by The Demiurge. Originally developed under the Covenant, the vessel was intended as an extension of the Prophet's plans to replace the Sangheili as their guardians, by creating highly sophisticated warships that could operate independently for long periods of time. The original design called for a small skeleton crew commanding a largely automated warship, but when the prototypes fell into the hands of the Demiurge, they converted it into an almost fully automated warship, intended to be a "fleet of one". These ships became fundamental in the Demiurge's victory over the allies in the Demiurge War, and were essential for defence of Demiurge space.

History
The Decimator-class was designed by the San'Shyuum as a vessel intended to be crewed by a small group of loyal San 'Shyuum, to protector Procurator vessels and their interests, without reliance on Sangheili guards. The Decimator would be a monolithic vessel, larger, more heavily armed, and even more well protected than even the might OSS-class Battlecarrier, and at it's command would be thousands of drone ships of varying sizes and role, giving it a distinct advantage in most fights. This was further coupled with exotic stealth systems, not only making it deadly in ship to ship fights, but now utterly undetectable by it's enemies.

Only one ship would be finished, and entered trials in late 2544, using butchered UNSC AIs to make the shop operational. The ship was not as effective as originally desired, and would undergo continued trials, until 2553, when it, and the two unfinished prototypes, were seized by forces loyal to the then Shadow Covenant.

The ships would be further refined, and tested, untile the implementation of Thrall Intelligence units in their design. This technically reduced it to a unmanned complement of thirteen TI units, operating all aspects of the vessel. These ships became operational by 2563 and were deployed in the defence of the Demiurge territories. These self-sustaining vessels manufactured further sub-vessels, creating a 'dark fleet' that prowled the edge of Demiurge territory.

In the Demiurge War, they were essential in the allies defeat, creating an encirclement and heaping heavy casualties on UNSC and SOS fleets. Though the encirclement was broken, these ships continued to launch attacks on any lingering forces or further attacks. They continued to watch Demiurge borders.