Gyros-Thravian

Gyros-Thravian was Gharkul Blackfang's stronghold, an Ullanor-era Ork world that almost beat Horus, Dorn, and Mortarion together until the Emperor led a thousand Custodians in from the Bucephelus. Gharkul died on a ruined Gargant; three Custodians fell and their names went on the Emperor's plate. No dedicated planet page; keep the unofficial Ultima pin.