Born in the depths of a mysterious Eldan laboratory, the Strain is a virulent biological anomaly that has begun to spread across planet Nexus. With the power to change lifeforms into terrifying, mutated abominations, the Strain is an unimaginably dangerous threat.
All efforts to fight this nightmarish plague have met with failure. It is only a matter of time before it destroys all life on Nexus and beyond.
Who created the Strain, and for what purpose? Does it have anything to do with what happened to the Eldan? And can the universe be saved, or is already too late?

Most Strain creatures are horrifying to behold, with mutated appendages, grotesque bodies, and a general putrescence as a result of the bio-phage that permeates their bodies. Extra eyes, claws, and hardened carapaces also commonly develop in Strain creatures.

Corrupted Creatures of GrimvaultEdit

This near the heart of the Entity's power, the corrupted life forms of Grimvault have grown almost completely into creatures of Strain. These Strain creatures appear to have taken on specific roles related to combat and spreading infection as efficiently as possible.

Creatures designated cankertails are aggressive combatants, blightwings offer aerial support and surveillance, while corruptors spew forth infectious phage matter that can infect living organisms (as bio-phage) or mechanical life forms (as techno-phage).


The techno-phage is a nanotech form of bio-phage corruption which can infect and transform technology into servants of the Strain. The techno-phage allows the Strain to control Eldan technology, including everything from massive Eldan Annihilators to the titanic weapons inside Grimvault. The techno-phage is a constant danger to all machines, especially technological forms of life like the Mechari and Freebots.

Strain PhysiologyEdit

Scans of Strain creatures aboard the Fist of Azrion and the Widowmaker show how quickly corruption can spread within a contained environment. Although the mighty vessel was brought down only a short time ago, it is already completely infested with hordes of festering, aggressive Strain that are extremely resistant to damage. Data indicates most, if not all, of these Strain were passengers or crew on the ship before it crashed.

Final Stages of CorruptionEdit

Deep within the Phagelabs of Grimvault, the bio-phage - the most basic form of the Strain - originated. Although the Eldan vanished long ago, their final creations live on within the same Phagelabs, and are now approaching the final stages of corruption after untold centuries of tortuous life.

In becoming monsters of pure Strain, these long-suffering creatures have taken on bizarre and unusual shapes dedicated to specific functions that the Strain demands. They no longer contain even a trace of uncorrupted life.

OBSERVATION: Like the Skurge, these final-stage corrupted are pure Strain, a process which took centuries under Phagelab conditions. Unlike the Skurge, they were once normal creatures, but have been completely replaced, cell by cell, suffering all the way.

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