Board Thread:Questions and Answers/@comment-3125355-20131216070133/@comment-1622149-20140706183842

Feedback100 wrote: NRG is made of energy so the predator could be a cockroack-like alien (because they are immune to radiation) with sharp and long claws to drain his energy. The armour isn't the part of the Prypiatosian-B's  biology but it has slots through which his natural predator should be able to drain his energy.

actually scientific tests have killed cockroaches using radiation.