Silverfist playing tiddlywinks.
Giant magnet which, unusually, attracts silver.
Used by notorious criminal Silverfist in his plot to obtain every coin minted in America, then deform them in order to jam all ticket and slot machines, thereby causing the American way of life to collapse.
The silver magnet predates by more than two years the giant Nuclear Magnet used by Siegfried on Schwartz's Island.
[Comic Strip Story #3 (Unofficial title: "Silverfist").]