Since the end of the Horus Heresy, his Primarch brothers had disappeared one by one.
The Horus Heresy had left Vulkan deeply uncertain and worried about the Imperium's future. He had witnessed brothers slaughtering one another, seen the corruption and divisions within the Imperium, and begun to doubt the Imperium he had always fought for.
This inner struggle had led him to ponder his mission and where he belonged.
At the same time, the Salamanders Legion's gene-seed had certain flaws, which subjected its warriors to particular difficulties and dangers as they matured.
As the Legion's master, Vulkan felt deeply guilty for failing to resolve this problem. He believed it was his responsibility to find a way to correct the gene-seed flaws and safeguard the Legion's future, so he had decided to leave the Imperium and embark on a quest for redemption.
Vulkan also had many other tasks to carry out.
One was to hunt down and destroy all the Thousand Sons traitors, to atone for the bloody sacrifices they had inflicted on the Imperium's people during the Horus Heresy. His foremost target among them was Fabius Bile.
Yet after more than a thousand years, Vulkan's whereabouts had become a complete mystery.
Then someone discovered traces of Vulkan on the Imperial World of Kaundra.
At the time, he was fighting an army of a million Orks on Kaundra alone, battling tirelessly thanks to his nature as a Perpetual.
Later, with the help of the Imperial Fleet led by Imperial commander Koorland, Kaundra was liberated, and Vulkan accompanied Koorland back to Terra.
By then, more than a thousand years had passed since the Imperium had been entrusted to the High Lords.
Looking upon the chaos within the Imperium, Vulkan once again found himself lost. He condemned the High Lords' reckless misconduct, but