Still exploring some concepts from a world where an elder race has attained a godlike condition:
The Ruling Council has unanimously voted that the universe must be reset. The main justification is that they are the only civilization that ever reached the godlike condition in xxxxxxzillion years, that everything just keep repeating itself over and over, civilization A dies, civilization B is born, B advances and conquers C, and the only thing changing is the scale, groups, towns, nations, planets, systems...
Also, they have had enough and are bored.
What methods could be used to end the universe?
Antimatter? Exotic matter? Flip the switch?
Also, and extremely important so this doesn't become an idea generation question, HOW would they work?
Is the universe obliterated in a second? Does the destruction ride in a wave (like a ripple)? How long would it take given the size of the universe? Haha... Maybe its already destroyed and the wave just hasn't hit us yet.