Exactly what it says on the tin. Explanation follows.
Some friends and I were discussing the fastest game-breaking builds we could find. Note that, unlike Pun-Pun, the goal was not to create an arbitrarily powerful character, but a character that could disrupt the plot (within the rules) in a way that permanently destroys the world or forces a retcon.
The best we found so far is a 1st-level wizard somehow getting the cash or otherwise obtaining a scroll of Gate, and connecting the world of the campaign to the Sun. If you can get the scroll in your backstory, then you can do this on the first round. (Quick! Roll initiative versus the plot!)
But that only works if the Sun is the never-ending nuclear apocalypse that it is in our world. So... does anyone know if there is any canon on the nature of stars/suns in Pathfinder?
(In case you're curious, the next cheapest we found involved using two immovable rods and a necklace of adaptation to crash the moon into the earth)