- "We have weathered fiercer storms than this! Hold the line, damn you. You will not embarrass the Emperor today by dying!"
Varnus was a Chaplain of the Ultramarines Space Marine Chapter and the de facto leader of the small Space Marine Tactical Squad deployed to the Ice World of Lorn V that was detailed with the task of protecting and delivering a Titan's Princeps and crew to the site of the recently discovered Imperator-class Titan Dominatus. While en route to their objective, they were ambushed by the Blood Legion of Khorne warband of Chaos Space Marines under the command of Crull, a Chaos Lord of the World Eaters Traitor Legion, who shot down their Thunderhawk gunship. Varnus and the handful of surviving Ultramarines held off waves of oncoming Chaos forces, sending an emergency distress message that was received by General Sturnn, commander of the 412th Cadian Shock Troopers Regiment. In response, Sturnn assembled his Imperial Guard troops to go on a search-and-rescue mission deep behind enemy lines. During the battle on Lorn V that resulted, the remaining Ultramarines force escorted and successfully delivered the Titan's new Princeps and crew to the ancient war machine. The crew was able to power up its massive weapon systems and used them to destroy the attacking Ork and Necron forces. Chaplain Varnus single-handedly defeated a Bloodthirster in combat.