The Magicka interview on Big Download chats up Paradox producer Mattias Lilja about Magicka after learning that in spite of a buggy launch Arrowhead Game's action/adventure has sold over 200,000 copies in just 17 days. The conversation compares the pace of the game's sales to other Paradox games, reasons for this success, their ongoing patch releases (the latest of which was earlier today), plans to support the game with both free and paid DLC, and more. Paradox also sends word that they plan on unveiling a "surprise" about Magicka at this year's Game Developers Conference in San Francisco at the end of this month, coyly adding "it is not what you think it is."