10 cards where the illustration contains “diver-helmet”

Champion's Helm (Fallout #1010)
Cyclops Electromancer (War of the Spark #122)
Diver Skaab (Innistrad: Crimson Vow #56)
Erratic Cyclops (Guilds of Ravnica #98)
Gobsmacked (Unfinity #11)
Nivix Cyclops (Dragon's Maze #87)
Piston-Fist Cyclops (Guilds of Ravnica #217)
Power Conduit (Mirrodin #229)
Seagraf Skaab (Shadows over Innistrad #84)
Vedalken Mastermind (Fifth Dawn #40)

The arc of my blade has carved a path of light to the end of these results.