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Just letting you know, it's also the name of a pretty well-known suit of cards present in decks of playing cards.

Just letting you know Ace of Spades is a great motorhead song.

Just letting you know Ace of Spades was really cool voxel-based shooter game that was later remade in a terrible commercial version.

(And of course, it has modern community ports https://www.buildandshoot.com/)

Just letting you know, it's also a very derogatory racist term.