The first post-Schism warship series produced by the Covenant, the Vrathek-class is a significant backwards step by its builders, relying upon Jiralhanae designs and technological concepts, incorporating few pre-Schism Covenant technologies beyond its thrusters and shields. Taking its name after a Jiralhanae Demon, it was constructed at the Thratakrathak Shipyards above Unmoving Virtue, and quickly became the most common Jiralhanae large capital ships fielded against Sangheili and UNSC forces.