Extermination Biodrones, also known as Shog Knights, are an extremely dangerous alien weapon.
Story[]
In Oh, Hell Yeah, it is shown that the Joint-Intel Gathering Collective searching for Willy Pete has the remnants of a biodrone in storage and are using it to tap the aliens' communications network.
In I Never Looked in Your Eyes; I Never Heard Your Voice, the Infernal Service Provider summons a number of biodrones in Hell, referring to them as "cubicle security".