Purity of Spirit

Purity of Spirit was a Covenant that sent taunting messages to the  and the planet Reach during the Fall of Reach. It was also the sister-ship of the Undiminished Entelechy. During the Battle of Installation 04, Purity of Spirit and Undiminished Entelechy were secretly ordered to conduct a close-range survey of Installation 04 by the Minor Prophet of Stewardship before the arrival of Pillar of Autumn.