Sisters of Battle from the Order of the Ebon Chalice arrived to reinforce the Salamanders in 980.M41, who were already engaged in brutal urban combat against the Black Legion on the world of Heletine. Deploying dozens of Immolators and Land Raider Redeemers, the Chaos forces were put to the torch and the forces of the Imperium burned a path through the war-torn cities of Heletine. Despite the strength of the Imperial forces, the advance was halted when Lord Gralastyx - a Daemon Prince leading the Chaos forces - unleashed a legion of Possessed Chaos Space Marines. As frenzied Chaos hordes ripped through the Imperial ranks, Battle Sisters and Space Marines fought back to back as the situation became hopeless. However the Imperial forces were saved when Saint Celestine appeared and slew Gralastyx personally. With the death of their master, the Chaos Horde was quickly destroyed. But of Celestine there was no sign, for she vanished as mysteriously as she appeared.