Return
Shortly after
Abaddon the Despoiler's
Thirteenth Black Crusade and the destruction of
Cadia, the
Tech-Priest Belisarius Cawl and
Saint Celestine led a group of Imperial survivors into the
Webway with the aid of their new
Eldar allies. The group arrived at
Macragge, where Cawl revealed that he had in fact lived for the last ten thousand years and was ordered by Guilliman himself to complete two tasks in the event of his downfall. One of these was to revive Guilliman, a feat that Cawl could now accomplish thanks to Eldar aid. Using a suit of
Power Armour that regenerated the wounds inflicted by Fulgrim, Guilliman was restored just as
Black Legion forces invaded Macragge. Reborn, Guilliman swiftly drove off the Chaos invaders before taking in the truths of the Imperium after his ten thousand year absence. Guilliman displayed several "miracles" after his rebirth, his mere presence was able to cure any afflicted with a
Nurgle-created blindness-inducing illness.
[17]
Disgusted by the decay, superstition, and ignorance that surrounds the modern Imperium, Guilliman convened a war council of his Ultramarines as to what to do next. After several days he declared his intent to travel to
Terra and see his father upon the
Golden Throne. However Guilliman's revival had attracted the gaze of the
Gods of Chaos and
Daemon Primarch's, throwing the
Warp into an uproar. The journey to Terra, known as the
Terran Crusade, became an arduous affair that saw his fleet trapped in the
Maelstrom after an ambush by
Magnus and his
Thousand Sons. Inside the Maelstrom the Imperial expedition was defeated by
Kairos Fateweaver and the
Red Corsairs, with the Primarch himself trapped in crystal chains made from his own doubts. Held by Kairos inside a
Blackstone Fortress, the Imperial expedition seemed doomed. However thanks to the efforts of the
Harlequin Sylandri Veilwalker and the
Fallen Angel Cypher Guilliman and the rest of the surviving expedition were freed and escaped towards a
Webway Portal. Guilliman held the portal long enough for his men to escape, defeating the
Bloodthirster Skarbrand after witnessing the sacrifice of
Marshal Amalrich.
[17]
The Imperial expedition eventually arrived through another portal on
Luna, but this time were followed by Magnus and his Thousand Sons. On the surface of Luna, Magnus and Guilliman dueled as battle raged around them. Guilliman was overcome by Magnus' psychic abilities until the arrival of reinforcements from Terra that included
Sisters of Silence. With Magnus' psychic abilities weakened, Guilliman was able to impale his daemonic brother and force him back into the Webway as the gate was sealed.
[17]
Afterwards Guilliman landed on Terra and gained access to the Emperor's Throneroom inside the
Imperial Palace. Standing completely alone before the
Golden Throne for the next day, Guilliman emerged with a new determination. He gathered the
High Lords of Terra and declared that the Imperium would be reorganized and rearmed under his leadership in order to confront the coming threat of Chaos. With that, Guilliman declared himself
Lord Commander of the Imperium once more.
[17] He later declared himself
Imperial Regent, the living hand of the Emperor. One of his first major acts as Lord Commander was to defend Terra itself against the forces of
Khorne in the
Second Battle of Terra.
Guilliman subsequently declared the
Indomitus Crusade to reclaim the
devastated worlds isolated from Terra by the
Great Rift. The campaign was waged for the next century, as Guilliman acted as supreme commander and chief administrator of the Imperium. He simultaneously oversaw vast campaigns spearheaded by
Belisarius Cawl's new
Primaris Space Marines and sweeping civic reforms which culminated in the
Codex Imperialis. As the Indomitus Crusade wound down, he rushed back to Ultramar to protect his sons from the
Onslaught of Nurgle.
[18] During the Plague Wars, Guilliman battled his former brother
Mortarion on
Iax saved and survived an assassination attempt by Mortarion,
Typhus and
Ku'Gath on
Parmenio. Guilliman was nearly cornered in the trap but was saved by the efforts of a mysterious young girl that seemed to be a powerful
Living Saint.
[22a]