Velim is a Codicier serving in the Deathwatch and is stationed on Fort Excalibris. When Excalibris' Watch Commander Feron, learned that the Imperium Mining World Cagalian IX was infested by a Genestealer Cult, he led several of the Watch Fortress' Kill-Teams to purge the Cult. Velim was attached to one of the Kill-Teams taking part in the mission, but when they attacked the Cult, known as the Cult of the Rusted Claw, the Kill-Teams were beaten back and they were shocked to discover that the Cult was larger and more powerful then they had suspected. Their failed attack caused Feron's Kill-Teams to suffer many casualties and he decided, that instead of fighting to the death against the Cult of the Rusted Claw's unfathomable numbers, they would retreat and inform the Imperium of what had happened on Cagalian IX. As the Deathwatch retreated to their evacuation point however, they were attacked by a large force of the Cult and in the ensuing massacre, Feron and many of his Kill-Teams were killed. Thanks to the efforts of the Dreadnought Xandor though, who destroyed a larger number of Genestealers blocking the extraction point, Velim and his ravaged Kill-Team were able to escape off world and bring word of the Cult's threat to the Imperium.