Shinigami Nanobot Swarm

Slow, yet deadly and silent, the Shinigami is in essence not one unit, but several smaller ones; it is in essence a small cloude of airborne nanomachines whose main task is to kill anything it comes in contact with. Only units armed with powerful weapons, like explosive shells, lasers, flametrhowers or plasma are capable of destroying these clouds of microscopic death before they can do their grisly work of dismembering their targets one molecule at a time; bullets and MAG weapons simply cannot work on them.