Ent bio-carbines have mostly dissolved into organic matter over hundreds of thousands of years. However, some have been preserved in ice, Ent bio-preservation devices, or in abandoned Precursor laboratories. These weapons are sentient, and were designed to overtake an army shroom puppet's mind when in contact with it. Such a creature will find its intelligence, physical strength and speed massively upgraded, and may act as a field commander for others of its kind. This extremely rare and dangerous creature is known as the army shroom exterminator, and lives up to its name.