The Guns of Asgard Minigame
In central Asgard, use magic or TK to rebuild the fallen cannon by the broken end of the Bifrost.
Mount the gun to begin a shooting challenge- gun down 30 enemies in 60 seconds. It's not that hard- most enemies come from behind the camera, so they're super visible, and they tend to fly by in groups of three, with the first well ahead of the other two, to give you some lead time. And of course, the auto-lock helps
Splash enough hostiles before the timer runs out to win your brick, and a Minigame Master point.