Amusingly this has a bit of a fantasy poster, Demons crawling around and a macho man with a frisky lady wrapping herself around his Muscular body while he completely ignore her to raise his weapon in the air, and probably give some primal scream, that's in so many fantasy promotional art.
fair enough, unless you infer that he's firing off an E.M.P. weapon to disrupt the overwhelming forces. after all, those baddies are mechanoids and the pair seem to be humans with little or no cybernetic modifications. i'll admit i thought the same thing at first glance, but give the artist the benefit of the doubt and open your mind! besides, it's a commissioned fantasy piece! (yes, it's sci-fi, but it's meant to indulge the fantasy of the person for whom it was commissioned.)