Broken Legion

Creation
The nether trap spell (detailed below) depends on the power of a hundred souls. These must all be delivered at the same moment, requiring that they be stored in a single location. That many souls are also extremely volatile, and to minimise the risk of explosion when transferring them, the soul stone had to be capable of capturing and storing the souls with the same component.

The Blade
A regular truesteel sword from Draenor was chosen inadvertently during a fight in a nether-rich Legion ship. The region's peculiar magical composition meant that when Commander Bladeheart of the Outriders slew a Dreadlord, that demon's soul merged into his weapon.

The Maw
To permit the Dreadlord-augmented blade to feast on any demon's soul, it needed an infusion of the essence of essence-hunger. With the aid of the Delmoore Organisation, Outriders tracked down a freakishly large felstalker and relieved it of its soul.

The Cage
One hundred souls is enough to channel a monstrous amount of power, more than readily even without a warlock's deliberate involvement. Outriders called the aid of Delmoore Organisation and fighters from Midnight Magnanimity to break into a Legion forge camp. They slew a jailer there, and salvaged a valve from its soul cage that would allow souls into the Blade, but not out.

Taking brutal losses, the Outriders defended their blacksmith Olm as he combined the three components into a single sword. The weapon was named for ex-Warlord Gral'nok's defeated Steelcrusher Legion, and for its intended role in vanquishing the demonic invasion.

Collecting the Hundred
For five months after the forging mission, Outriders carried the Broken Legion into battle. Demons were cowed by it at first, but soon adapted to the threat. By the end of the Broken Legion's use, they actively prioritised the bearer in an effort to capture and destroy the weapon and release the souls within.

Notable Captures
Where possible, Outriders executed demonic officers and cult leaders with the weapon. Exorbitantly powerful warlocks such as Aiden Smiles, and demons such as Fel Lord Erzob and Berith, all linger within the blade, technically retrievable if the weapon were to be destroyed prematurely.

Security
The Broken Legion is kept in the Outrider Vault's third, and least accessible chamber. Attempting to get there without a closely guarded map is impossible, as confusing magic haunts the secret passages, and torches invariably go out. On top of this, the sword's containment is a locked and warded chest.