Two brothers turned discovery into dominion—and taught Phyrexia how to enter Dominaria.
The Brothers’ War
A feud between Urza and Mishra turns recovered Thran power into a continent-spanning arms race. The Sylex ends their war at Argoth, ignites Urza’s spark and begins Dominaria’s long struggle against Phyrexia.
Why this story matters
The route in brief
The Brothers’ War is often remembered as a duel between two brilliant artificers. That description hides its true scale. Urza and Mishra did not fight alone or in an empty landscape: kings financed them, soldiers operated their inventions, cities became targets and whole ecosystems were converted into fuel. A private fracture became a public catastrophe because power kept rewarding escalation.
At the centre were two powerstones recovered from the Thran ruins beneath the Caves of Koilos. Urza held the Mightstone and Mishra the Weakstone, each brother convinced that reunion should happen on his terms. Their machines offered kingdoms decisive advantages, so political ambition amplified resentment that might otherwise have remained inside one family.
Phyrexia entered through that opening. Its agents encouraged Mishra’s dependence on increasingly inhuman artifice while Urza answered every threat with another design. By the time both armies reached Argoth, victory no longer meant restoring anything they had loved. The Sylex ended the battle, but its blast created an Ice Age, awakened Urza as a planeswalker and gave him a new enemy to pursue for millennia.
Read in order or choose a turning point
Story Chapters
-
The stones beneath Koilos
A Thran machine and a divided powerstone gave Urza and Mishra symbols neither brother was willing to surrender.
Urza and Mishra were trained to look at ruins as questions. In the Caves of Koilos, that curiosity brought them to a machine from the Thran age and the power source at its heart. When the stone split, Urza emerged with the Mightstone and Mishra with the Weakstone. Each half strengthened its bearer while pulling toward the other.
The discovery did more than create a valuable artifact. It gave both brothers proof that the other possessed something incomplete yet essential. Cooperation could have reunited the stones, but rivalry made possession feel like identity. Giving up a half became indistinguishable from admitting that the other brother deserved the whole.
Koilos also concealed a doorway into Phyrexia’s history. Neither young scholar understood what had noticed them or how their excavation would connect Dominaria to an enemy built around conversion. The first danger was therefore not an army crossing a portal. It was knowledge arriving without the judgement needed to decide what should remain buried.
Open dedicated chapter -
Courts, apprentices and machines
The brothers entered rival kingdoms, where personal invention became state power and compromise became politically expensive.
Urza joined the court of Yotia and married Kayla bin-Kroog, gaining access to workshops, resources and authority. Mishra rose among the Fallaji and became indispensable to their qadir. Tawnos and Ashnod served as apprentices whose ingenuity expanded what each side could build, even when they questioned the ends their teachers pursued.
Machines changed the balance of power quickly. Ornithopters improved reconnaissance, automatons replaced formations and recovered Thran devices promised strength no ordinary army could match. A kingdom that refused the new technology risked losing to one that embraced it. That pressure allowed both brothers to present escalation as defence.
The war acquired its own momentum. Rulers made territorial claims, populations remembered attacks and commanders depended on supply networks built for continued fighting. Urza and Mishra remained central, but they were no longer the only people with reasons to prevent peace. Their grievance had become an institution.
Open dedicated chapter -
Gix enters the war
Phyrexian influence turned Mishra’s search for strength into a route through which an older evil could study Dominaria.
The Brotherhood of Gix treated machines as sacred and offered access to power beyond ordinary Dominarian craft. Behind that devotion stood Gix, a Phyrexian demon who recognised the value of the conflict. Mishra wanted enough strength to defeat Urza; Phyrexia wanted dependence, information and eventually a world opened from within.
Mishra’s army incorporated dragon engines and other devices whose origins he could not safely control. His body and judgement changed as the alliance deepened. What looked from a distance like technological advantage was also a process of replacement, one compromise making the next feel practical.
Urza saw the danger but not the lesson. He understood that Mishra’s forces were becoming Phyrexian, yet continued to measure his own response by whether it could win. Recognising corruption in an opponent did not stop him from treating people and land as components. The brothers differed in allegiance, but both had learned to reduce consequences to engineering problems.
Open dedicated chapter -
Argoth is consumed
With Terisiare exhausted, both armies invaded Argoth and converted a living refuge into the final fuel of their war.
Decades of construction emptied mines, forests and treasuries across Terisiare. Argoth still held resources in abundance because its people and guardian, Titania, had resisted the industrial appetite surrounding them. To the two war machines, that survival made the island look less like a sovereign home and more like an untouched supply depot.
Urza and Mishra landed armies on Argoth despite local resistance. Trees became timber, soil became a battlefield and creatures defending their world were classified as obstacles. Titania’s forces fought both invaders, exposing the lie that either brother still represented a clean side in the conflict.
The struggle on Argoth concentrated everything the war had become: invention without restraint, politics narrowed to conquest and a natural world asked to pay for human obsession. Even victory over the opposing army could no longer repair the island. The only remaining question was how much of Dominaria would be taken with it.
Open dedicated chapter -
The Sylex blast
Urza discovered what Mishra had become and answered with a world-changing weapon whose power reached far beyond the battlefield.
In the final confrontation, Mishra merged with a dragon engine and revealed the extent of Phyrexia’s transformation. Urza confronted both his brother and the proof that their war had invited something larger onto Dominaria. Shock did not lead him back toward restraint. It convinced him that no smaller answer remained.
Urza activated the Golgothian Sylex by pouring the pain, memory and power of the land through himself. White destruction expanded across Argoth. Armies, machines and the island were erased in an event too large to distinguish combatant from witness or enemy from the world beneath them.
The blast ignited Urza’s planeswalker spark, but survival was not vindication. Coastal regions were ruined, the climate collapsed toward an Ice Age and the Multiverse around Dominaria was altered. One man escaped the consequences in a newly powerful form while countless others inherited them without choice.
Open dedicated chapter -
Everything after Argoth
The war ended, yet its machines, trauma and Phyrexian connection determined thousands of years of history.
Dominaria entered the dark climate created by the blast. Civilisations adapted, migrated or failed, while stories of Urza and Mishra hardened into legend. The Shard of Twelve Worlds limited planar travel around the region, isolating worlds during an age whose inhabitants had no part in the decision that caused it.
Urza focused on Phyrexia. He built academies, created Karn, manipulated bloodlines and designed the Legacy as if enough preparation could redeem the scale of his first failure. His hatred was grounded in a real threat, but revenge also allowed him to keep using the logic of the war: every life could become a resource if the final objective was important enough.
Thousands of years later, Teferi returned to the moment of the Sylex blast to learn how a replica might stop New Phyrexia. History offered no clean instruction manual. It offered a warning that the weapon required a person to channel a world’s pain—and that solving the present by copying Urza also meant confronting what his solution had cost.
Open dedicated chapter
Keep exploring