Macragge.
The fortress-world of the Ultramarines.
Home to one of the Emperor's greatest sons — and one of His most grievously wounded.
The Ember Vow descended through a storm-wracked sky, its hull lit by flickers of psychic lightning. Imperial Navy escorts peeled away, their commanders unwilling to risk standing in the Flamebringer's way. Every man and woman on the ground knew the truth: Roboute Guilliman lived… but Fulgrim's venom was killing him.
The Hall of Stasis
Calgar was the first to greet him. The Chapter Master of the Ultramarines looked older than Shawn remembered from their last encounter, but his eyes still burned with the discipline of a man who had carried the weight of an empire.
"Supreme Commander Newman," Calgar said, his voice low, respectful. "We have done everything the Apothecarion could devise. The venom resists all known treatments. Even stasis cannot halt its spread."
Shawn's towering form — Primarch-height, his shadow stretching across the chamber — stepped past Calgar without hesitation.
"Then it's not a cure you need," he said, voice steady as iron. "It's will."
Guilliman lay before him, encased in a field of shimmering blue energy. The venom was visible even through the armour — black tendrils crawling through the veins of a demigod.
Valdor's voice came from behind. "That poison is not of flesh or warp alone. It's soul-deep."
Shawn knelt beside the Primarch, closing his eyes. Liquid Haki welled from him like molten gold, flowing down his arms, coating his hands. The room dimmed — his will eclipsing even the glow of the stasis field.
The Purge
The moment his hands touched Guilliman's chestplate, Shawn's Haki surged inward, piercing through layers of gene-forged biology. The venom fought back — a whispering echo of Fulgrim's voice, sweet and poisonous, promising pleasure and power.
Shawn's mind slammed against it like a tidal wave.
No more chains. No more corruption.
Liquid Haki flooded Guilliman's veins, coating every cell, every fibre of his soul, driving the venom out. The poison writhed, trying to anchor itself deeper — but Shawn's will was relentless. He shaped his Haki into hooks and blades, cutting it away, strand by strand.
Guilliman's body convulsed. His lips parted, a hiss escaping. Black ichor seeped from the wounds, sizzling as it touched Shawn's Haki, disintegrating instantly.
Calgar watched in awe. "By the Throne…"
Valen, standing near the entrance, murmured, "He's burning the corruption out from the inside."
The Will to Heal
This was no quick battle. Minutes turned to hours. The venom was not merely a toxin — it was Fulgrim's final spite, a soul-poison that had rooted itself into Guilliman's essence.
Shawn dug deeper, his breathing harsh, sweat streaking his face. He let his Conqueror's Haki flare, not to dominate — but to shield Guilliman's spirit from the poison's whispers.
"You're not done yet," Shawn said quietly, not sure if Guilliman could hear him. "The Imperium needs its generals. And I need my brother-in-arms."
At last — with one final surge of molten will — the venom shattered. A wave of pure, golden liquid Haki spread through Guilliman's body, repairing what it had eaten away.
The Primarch's eyes opened.
A New Oath
Guilliman inhaled sharply, the first untainted breath in centuries. His gaze fell on Shawn, recognition and something deeper passing between them.
"You… pulled me back," he said, voice still weak but steady. "I owe you more than words."
Shawn stood, towering over him. "Then give me your strength. The galaxy isn't done trying to kill us."
Guilliman's lips curved into the faintest ghost of a smile. "You have it. All of it."
Calgar dropped to one knee before them both. "The Ultramarines stand with the Flamebringer."
Shawn looked around the chamber — at Guilliman, at Calgar, at the assembled officers. "Then let's make the galaxy regret every moment it thought us divided."