The Cabal presence on Mars is locked in an endless war with the Vex - and at the heart of this war is the Blind Legion. Deployed to defend vital artifacts seized from the Vex, the Legion holds its ground with fanatic zeal.

Blind Legion soldiers brave one of the most thankless, grueling assignments in the Cabal order of battle: descending into buried ruins and black catacombs to sweep for Vex presence.