Namor, the Sub-Mariner #13

Part of the 1991 "Trial of the Sub-Mariner" arc, this issue poses a striking image: Namor, bare-chested and defiant, blows a great golden horn while perched atop an enormous sea creature that looms over a cityscape below. John Byrne — handling both the writing and the cover art — frames Marvel's first and mightiest mutant as a figure of primal, almost mythic power, the tagline "Reap the Whirlwind" suggesting the consequences are about to crash down hard. It's a visually arresting cover that makes you want to dive straight into whatever storm is brewing inside.