Outlaws of Thunder Junction is a top-down designed set based on Wild West tropes. It is a frontier fantasy where outlaws come to seize their futures — and make a fortune doing it. This showcase set is dedicated to villains, focusing on an "Outlaw vs. Outlaw" theme. It was even designed first as a villains set, second as a Western genre set.

Outlaws of Thunder Junction contains 276 regular cards (91 commons, 100 uncommons, 60 rares, 20 mythic rares, 5 basic lands), and includes randomly inserted traditional foil versions of all cards. The regular cards include 5 full-art "Western landscape / negative space" basic lands (#272-276). Alternate card frames have a different number than the original version. The Bundle Basics lands are #277-286, the thirteen Showcase "Wanted Poster" cards are #287-299. Borderless cards and #300-306, extended art cards and #307-367 and the promos are #368-374.