Plate beetles (actually engineered primarily from ticks) are large saucer-shaped arachnids with massive carapaces and very little else. They are limbless and immobile, consisting of a hypostome for sucking blood and a pocket of tissue feeding on that blood and maintaining their exoskeleton, which makes up over 90% of their mass. Placed on bare skin, a plate beetle will anchor itself (usually with the aid of non-toxic glue) and begin sucking blood. Attached, the beetles act as a form of ablative plate, absorbing damage.
Plate beetles are armor [Low]
They provide 6/6 armor, reduced by 1/1 for each hit.