Lazy copy-paste:
Magicka Collection (December 2012)
Includes 21 items: Magicka, Magicka: Aspiring Musician Robes, Magicka: Dungeons and Daemons, Magicka: Final Frontier, Magicka: Frozen Lake, Magicka: Gamer Bundle, Magicka: Grimnir's Laboratory, Magicka: Heirlooms Item Pack, Magicka: Holiday Spirit Item Pack, Magicka: Horror Props Item Pack, Magicka: Lonely Island Cruise, Magicka: Marshlands, Magicka: Mega Villain Robes, Magicka: Nippon, Magicka: Party Robes, Magicka: Peculiar Gadgets Item Pack, Magicka: The Other Side of the Coin, Magicka: The Stars Are Left, Magicka: The Watchtower, Magicka: Vietnam, Magicka: Wizard's Survival Kit

Don't be a dick and enter if own most of it.