Agmar is a young but talented Inquisitor of the Ordo Hereticus. In 993.M41 he became key to the Imperial defense of Ichar IV from Hive Fleet Kraken. Initially battling Genestealer cults on Ichar IV's capital of Lomas, Agmar discovered during the course of the battle that the planet was suffering a Genestealer infestation of unparalleled size. In the utmost secrecy he sent a report to an Inquisitorial Conclave and awaited the arrival of Space Marines.
Battling the Genestealer forces on Ichar IV for thirty-nine days with only his retinue, Arbites, and the local PDF, Agmar received assistance from the Ultramarines when their Battle Barge Octavius entered orbit. The Astartes proved decisive in turning the tide against the fanatical cultists and their Genestealer overlords. However after the battle, Agmar learned from interviews with surviving Astropaths that a strong disturbance in the Warp had been detected. Concluding this to be the Shadow in the Warp, Agmar warned the Inquisition that a new Hive Fleet was approaching Imperial borders. He proved correct, when Hive Fleet Kraken arrived shortly after.