The religious group known as the Opaline Creed operated in an ancient cloister outside the city Templemarch on the planet Crucival by 4 BBY. Hazram Namir, a Creed member who went by Umu Seven, went on an errand to a bazaar before returning to the cloister with acquired supplies for the Creed engineers, trademasters, and weaponsmiths, joining fellow Creed member Pira Ten on the cloister's grass yard after. The cloister became ruins by 1 BBY when Namir used it for refuge after escaping a battle. The man survived there for nearly a week before leaving and following a line of people departing from Templemarch.
The cloister was located on the planet Crucival (pictured on map).
The Opaline Creed resided in the ancient cloister by 4 BBY. That year, the Creed member Hazram Namir, who went by the name Umu Seven, was sent from the cloister to collect supplies from the bazaar. Namir eventually returned to the cloister and handed various devices and device parts he had acquired to Creed weaponsmiths, engineers, and trademasters. Afterward, he joined his friend, fellow Creed member Pira Ten, on the grass yard where around a hundred other Creed followers slept on blankets. The pair spoke about the relatively peaceful period they were enduring, which Namir called boring.
The Creed fell within the next four years, and the cloister was reduced to ruins. In 1 BBY, after Namir barely escaped a battle against the Rebel Alliance's 61st Mobile Infantry at the Galactic Empire's transmitter tower, he took refuge in the cloister's ruins and watched the battle rage on in the distance. The tower fell to the rebels the day after, and Namir spent nearly a week surviving in the cloister, eating bird eggs to sustain himself and sleeping in his unwashed clothes. Although he felt he could not return to Templemarch, he decided to leave the ruins when he noticed a line of people leaving the city for the 61st's own camp.
The cloister appeared in the 2015 novel Battlefront: Twilight Company, which was written by Alexander Freed.