Typhon Primaris was a jungle-covered Imperial Feral World found in the Sub-sector Aurelia of the Korianis Sector and was one of the primary recruiting grounds for the Blood Ravens Space Marines Chapter. Its population primarily consisted of a small number of human settlements and several clans of feral Orks. During the events of Dawn of War II an Eldar Warp Spider Exarch was provoking the Orks to attack Imperial outposts and villages, and the Space Marines of the Blood Ravens Chapter intervened. However, unknown to them, Typhon Primaris had been infested with Tyranid Genestealers and some plants and animals became mutated by the Tyranid organisms, killing livestock. Soon after, a Tyranid splinter Hive Fleet appeared over the planet, threatening to engulf the entire star system. Ultimately, to deal with the Tyranid threat an Exterminatus order was enacted upon the world by the Inquisition's Ordo Hereticus at the command of the Puritan Inquisitor Adrastia, leaving it a barren, blasted Dead World.

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