Sometimes the best part of worldbuilding is coming up with inventive ways for villains to destroy all your hard work. This expansion is meant to get you to do just that: create a doomsday device (or spell or creature or whatever, go wild) that can destroy at least an entire world, but feel free to ramp it up to a solar system, galaxy, universe, or the entirety of reality if you're feeling particularly omnicidal today. Below are a few questions to help you get your mad scientist juices flowing. How does your doomsday device destroy things? What is the scale of the destruction it causes? How does one activate the device? Is there any way to stop or destroy it?