Armmalunus, known as The Crystal Shell Beast, is a species of fanged beast that will live exclusively in the wastelands of Extinction. It is a fast territorial beast that feeds on organic polymer and corrupted material. When tamed, it's known that its stats and resistances will vary based on what it is being fed. A variant of the Armmalunus, Brute Armmalunus, is also known to exist, which is much stronger due to having a specialized diet which allows it to consume corrupted creatures for their strength without the negative effects. The artwork associated with it suggests other abilities but it is unclear how legitimate these are.