The Burnt World of Athas - 30 Days of Dark Sun 29: What’s your favorite promotional/rare item?

The 29th day of #30DaysofDarkSun is here and the question is "What’s your favorite promotional/rare item?"

This is a companion discussion topic for the original entry at

Dark Sun is blessed with some amazing collectibles. The art prints, the cloth maps, the cap… I am fortunate to have those (but no belt buckle!). I also love the soda can sleeve, from the Dark Sun 4E Encounters season. There was also a 4E DM reward that was a glossy color cardboard Dark Sun card/dice box. Technically, the 4E adventure Blood Sand Arena is promotional, with an amazing arena map I’ve used countless times. I love my French-language copy of Veiled Alliance, and my shrink copy of the first boxed set… oh, I want to collect it all!