"All things must wither and die. Let root rot and bower blight, to feed the pestilence of abandoned hope."
- — Aghalor, the Bringer of Poxes
There exist unconfirmed reports of Blight Drones coming down to rest upon piles of corpses seemingly to feed, liquifying the carcasses of the dead and the dying, and sucking up the decaying sludge, perhaps to fuel themselves or maintain their presence in the physical universe. There exists no evidence of Blight Drones landing anywhere or needing any form of maintenance, nor did they ever return to any base of operations.
Although the Blight Drone's first confirmed encounter with the Imperium was during the Siege of Vraks, and their true origins remain unknown, it was far from the last. Since the Siege of Vraks, Blight Drones have been encountered in several other battles, notably fighting alongside Chaos Space Marine warbands such as the Purge and other Death Guard splinter factions. Additionally, unconfirmed reports have placed these obscene weapons as part of daemonic incursions in both the ongoing conflicts in the Charadis Rifts war zone and the Auralis war zone, and they were also sighted during the fall of Hive World Mitra, the invasion of Forge World Graia, and during the 13th Black Crusade.
The Blight Drone's macabre and deadly reputation was more than matched in dreadful fact by their effectiveness on the battlefield. The drone is armed with a Reaper Autocannon, and a Mawcannon. The Mawcannon is a smaller version of the weapon found on the mighty Soul Grinder Daemon Engines, and fires out gouts of corrosive toxic bile that is powerful enough to eat through metal and liquify flesh in seconds as opposed to the Soul Grinder's preferred Warpfire. The bile from the drone's Mawcannon was extremely effective against the entrenched infantry and vehicles on Vraks, while troops out in the open had little cover from the drone's Reaper Autocannon. The creature's Mawcannon is also capable of spiting out large roiling masses of mutating phlegm at a distance, destroying entire enemy squads in one great blast. The Blight Drone's seemingly squat and bloated form is also unusually resilient against attacks, especially for a skimmer of their size. This quality is attributed to the living flesh and rusted armour plating of the drone, as well as the will of whatever dark intelligence is guiding them. If a Blight Drone is destroyed in combat it invariably detonates in a shower of bile and pus, and is capable of causing extreme damage to everything caught within the blast.