The Ark

The Ark is a piece of lost technology that Knives Millions uses to absorb all the plants from Planet Gun Smoke. In its original form it is a part of a larger fallen ship the Knives has fixed to travel in. After absorbing numerous plants the Ark becomes the center of a larger plant being controlled by Knives. It is eventually taken down by a combined effort of Vash the Stampede, Earth's Forces and the collective consciousness of the humans from Gun Smoke.