Oh wow —that’s a classic pulp-horror comic cover style.
It’s got “TERROR TALES” across the top and the main character is standing in a doorway looking absolutely terrified, mouth open like he’s screaming. There’s a big jagged yellow starburst caption that says “It’s in there!”—and the vibe is extra creepy because the “thing” is implied, not shown. The thick outlines and high-contrast colors make it feel very old-school comic-book sensational.