Enjoy the Only Warhammer Movie available as to this date!
Story: In orbit above the planet, Captain Severus departs the cruiser with only Pythol and the ten-strong Ultima Squad as support, all of whom are highly eager to prove themselves in battle finally. En route to the planet's surface, Severus addresses the squad, informing them of the distress call received shortly before all contact with the planet was lost, and how it is still unclear whether it is automated or not. Soon enough, they arrive on the tough and unforgiving desert surface of Mithron, and head in the direction of the only location of importance on the planet: a shrine guarded by a full company of one hundred Marines from the Imperial Fists. En route to the shrine, Proteus senses something shadowing them and opens fire on it, but when the others fail to find any evidence of their supposed pursuer, they quickly dismiss his concerns as just nerves, something which Proteus denies. Soon afterward though, Ultima Squad discovers that a terrible battle has indeed taken place, with the garrison force annihilated and the planet's Imperial shrine desecrated. It is also evident that the forces of Chaos are responsible, and against Pythol’s advice to retreat, Severus decides they must continue the mission to search for any remaining survivors. While approaching the ruins, the Ultramarines are ambushed by the Black Legion. Three of the Ultramarines (squad leader Veteran Sergeant Crastor, Brother Lycos, and Brother Boreas) are killed, but the ambush is thwarted. The squad then continues on, and eventually makes it inside the shrine. While traveling through a dark passage, though, they are attacked by a Daemon Prince, which kills Brother Maxillius and grapples with Severus, causing them both to fall through a wall and down a ravine. With Severus gone and Crastor dead, command of the squad then falls to Proteus, who decides to continue with the mission. Progressing to the reliquary at the shrine's summit, they find Chaplain Carnak and Brother Nidon, the sole surviving members of the Imperial Fists' 5th Company. They reveal they have been protecting the Liber Mithrus, an ancient sacred Codex given by The God-Emperor of Mankind himself to the chapter upon its founding. Ultima Squad agrees to help escort the book to safety, but Brother Verenor and Proteus remain suspicious, questioning just how the two Imperial Fists have managed to survive for so long by themselves. As Ultima Squad[5] retreat to the extraction point, they are attacked by a huge force of Chaos Space Marines. During the fight they suffer heavy casualties, with Brother Remulus being killed and Brother Junor sacrificing himself by detonating his damaged flamethrower to hold off the Chaos Marines. Just as they are about to be overwhelmed, Captain Severus suddenly reappears and aids their escape. Back on board, Proteus confides to Severus his suspicions of Carnak and Nidon, believing that they may have been tainted by Chaos. They confront the Imperial Fists, with Severus taking the book and discovering that it is blank. When Brother Hypax enters the room while bearing the Ultramarines' standard, it ignites, indicating the presence of Chaos. Severus declares that Carnak has been tainted and kills him. Nidon becomes enraged and attacks Severus, but is easily thrown off and knocked unconscious. Hypax, however, notes that the standard is still burning despite Carnak’s death, indicating that Carnak was not in fact possessed and the Daemon is still alive. At this point, Severus then suddenly turns and attacks those present, revealing that not only was his body possessed by the Daemon he had fought earlier, but also revealing that the whole mission was a trap staged by the forces of Chaos to allow the book to be taken off-world. Before it can kill more of them, an enraged Hypax charges the Daemon with the standard, and forces it into the armoury. When Proteus and Nidon eventually regain consciousness, they find both Hypax and Brother Decius slain, along with an injured Pythol. Accompanied by Nidon, the three confront the Daemon in the ship's reclusium where they discover the seemingly blank Liber Mithrus is actually a disguised book of arcane knowledge. The Demon possessing Severus then twists his body into its true form and reveals its plans to transfer itself into Proteus’ body in order to infiltrate the Ultramarines' homeworld of Macragge where it will then use the book to open a warp gate and destroy the planet. Before it can carry out its plan though, Pythol arrives and manages to save Proteus from being possessed at the cost of his own life. Using the diversion, Proteus then takes the Thunder Hammer from the reclusium to kill Severus and banish the Daemon possessing him back into the Warp. Sometime later, it is shown that Proteus has been promoted, with Verenor now as his second-in-command, and the final scene mirroring the opening one, with Proteus swearing in new recruits on the sacred hammer.