The Amazing Spider-Man #351 (Marvel, 1991)

Spider-Man and Nova team up to take down the Tri-Sentinel on this action-packed cover from the impressive art team of Mark Bagley and Randy Emberlin. The Tri-Sentinel first appeared in ASM #329, where Spidey -- imbued with the cosmic powers of Captain Universe -- defeated it with ease. Now, the mechanical menace is back and more dangerous than ever, but this time, Spider-Man is sans cosmic superpowers! Left with only his webs and his wits, Spidey will need Nova's help to ruin this rampaging robot! Rich detail and Bagley's signature use of dynamic forced perspective further enhance this scintillating, Sentinel-starring cover.