You have a choice of three entities to invoke who create chaos, but Eris is just too random, it might hit you. Cthulhu is way too dark. Yes, it is not a good party if nobody dies, but that is not what you are aiming for. His variety of madness is a bit too extreme for these people, who, after all, are mostly your friends. It is only the blowhard, boring, over-rated gay leatherman whom they have brought in under the illusion that hets actually would care what he has to say that you want to make an utter fool of.
And for this we have the perfect helper--LOKI!! The old Norse God of Mischief!
So bring this fellow into yourself and watch the fur fly off the paddles.
Remember, nothing is true and everything is permitted, especially when it is fun.