A thick, trifolded parchment. The exterior has been decorated with a colorful sketch of humans doing battle with a muscular demon holding a wickedly curved sword. The interior is scrawled with baffling tables and calculations. At the center of the parchment’s interior are the words “Reject what occurs. Defy the cosmos. Cry out. “That doesn’t happen!””
At any time, the players may use this phrase (“That doesn’t happen!”) to reject the most recent ruling of their referee. When they do this, the paper bursts into flame, and the character holding it must save v. breath or take 2d6 damage.
The referee is now obligated to change the call to which their players objected. They must, in good faith, change their ruling to one that is more favorable to the players. But the referee is under no compulsion to respond in any specific way that the player’s desire.
The trifold parchment cannot overturn the results of a die roll, even if the players did not see the roll. Only deliberate decisions made by the referee can be affected. So the players cannot, for example, reject which monster appears after the referee rolls on the encounter table.
Attempts to use the parchment incorrectly don’t destroy it, but they do occur in game.