From the back of the bookmark: The Official Star Munchkin Bookmark of the Weird Alternate Universe! (Guest Artist Edition)
You may use this bookmark in any game of Munchkin or its sequels. It may be used at any time. You may use only one bookmark (of any kind) per game unless you change sex. If you change sex, you may use a second bookmark. You may not use more than two in a game, no matter what.
(1) Show everyone the bookmark so they can satisfy themselves that it is what you say it is, because they may not be able to read it when you are done.
(2) When you play this bookmark, discard your Classes and Races,plus Super Munchkin and Half Breed if you have them. (Exception! If you are playing with Len Peralta's Star Munchkin Guest Artist Edition, you may keep Super Munchkin and Half Breed.) If you are playing a game that uses character traits other than Class and Race, pick two different traits (if possible).
(3) Go through the Door discard pile and take one Class and one Race, which you must put into play immediately.
(4) If you end up with a Class or a Race that you had in play previously (even if the art is different), rip up this bookmark because the dimensional transfer wasn't complete. Otherwise give it to the player on your right.