You may use this bookmark in any game of Munchkin (or its sequels) that includes Dungeon cards. It may be used whenever a Portal changes the Dungeons in play. 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.
(2) You may use this bookmark to keep a Dungeon in play when a Portal would discard it, or to discard a Dungeon as soon as it appears.
(3) To keep a Dungeon in play, point to the Dungeon you do not want discarded and say, "RETAAAAAAAAAIN." Carry out all other instructions on the Portal card.
To discard a Dungeon as soon as it appears, point to the Dungeon you want discarded and say, "SLAAAAAAAAAIN." Discard that Dungeon, ignoring any of its effects, and draw a replacement.
(4) Give this bookmark to the lowest-Level player other than yourself.He may not use it this game.