i gotta say techno if it is allowed, jam a whole lot of computers and the world goes poof, also i could make the shoop da whoop laser come out of people's computers, and can you say sir shmoopy?
if that is not allowed i would have to be dark and earth, maby a little fire, and wind, oh wtf, i would just be the whole shabang! which would be a little destructive, but nothing compaired to me in the kitchen, muahahahaha!!!!!! oh, heres a cool image http://www.e-maniacs.com/blog/wp-content/uploads/2009/03/elemental_magic_wallpaper_by_runescapeandmaple.jpg