Guy Fawkes Mask

The Clothier only lists it while Halloween is running, which is tied to your system date rather than anything you can trigger in a world. Miss the window and it is gone for a year unless you move your clock. It is appearance only, so it sits in a social slot and leaves your real helmet doing its job.

Guy Fawkes was the man caught guarding barrels of gunpowder under the House of Lords in 1605, part of a failed plot to blow up Parliament. The stylized grinning version of his face became a protest symbol centuries later, which is the shape the game uses. Look closely at the Pumpkin Moon and you will spot a couple of the Scarecrow variants wearing the same thing.