What's that? You still haven't experienced the boundless joy of mashing-up already hazardous incantations? That's inexcusable, but you'll be rewarded for your oversight: Steam has Magicka discounted for $2.50, and is letting users play it for free for most of the weekend!
Magicka is an action-adventure game set in a Norse mythology-oriented fantasy world. You and up to three other players take on the roles of wizards of a sacred order with the ultimate goal of stopping the evil dark sorcerer that has thrown the world into turmoil as his evil creations besiege the forces of good. By combining elements to cast spells you will wreak havoc and devastation among the lackeys of darkness. Team up with your friends and choose your way through the various levels of the campaign, or test your skill with "magickal" abilities in other challenging game modes.