Arrowhead Games – whoa, a strange “arrowhead” theme – showed off their isometric multiplayer Diablo-like action adventure Magicka at GDC, and so we’ve snaffled the video to post below. It’s looking like a fun time: you play as wizards and you can combine and mix spell powers to suit your tastes. There’s some really lovely detail on the monsters and environments, too. Also, it does seem to have a sense of humour and has friendly fire on all the time, for comedy happenings. The game will be out Q3/Q4 2010. Go take a look.