Kill The World

And to kill all humans.

Do you need to prove your dickery to the entire planet in some big-assed way? Then DESTROY the Earth because lol! When you Kill The Earth Because Lol, you're destroying a whole planet (that doesn't necessarily have to strictly be Earth) because of your own reasons that aren't ever explained. But of course, this'll take a lot of oomph. So what is it that you need to annihilate a planet-sized target? A Big-Ass Space Weapon, of course! But watch out! Those do-gooders that call themselves the Good Guys are sniffing around for an evil plot such as yours to ruin! But they're way too weak to stop you now, so you can just relax, build your Space Weapon, and be ready to pull its trigger at any moment.