Guardians of the Galaxy #21

A seething mass of symbiotes threatens to swallow everything in sight on Valerio Schiti's cover for this 2015 issue, with a black-and-white armored figure armed with a gun and whip-like weapon standing defiantly atop the writhing horde. Looming in the cool blue background are familiar faces — Rocket Raccoon, Groot, and several other Guardians — watching the chaos unfold. Brian Michael Bendis and Schiti deliver a cover that makes the scale of this symbiote threat feel genuinely overwhelming.