Luke Cage is downright bulletproof thanks to his skin being as tough as titanium. One of the more useful powers in the entire Marvel Universe, Cage’s skin as well as skeleton are so dense that it’s nearly impossible to injure the guy. In fact, you can fire at Cage point blank from as close as 4 feet and he may not even feel it. Add in the fact that attacks from other superhumans (even those stronger than him) won’t hurt him, and you have yourself a badass that you wouldn’t want to rumble with