Before you can enter the holy gates of heaven, you must perform a number of good deeds by helping the depressed. do you have what it takes to be a holy cow?
Drop blessings to those in need. Stay away from the touch of the Unholy Cow.; Mouse
Knock down the snowmen with snowballs before time runs out.
Collect the diamonds.
Remain hidden by avoiding Mad-Eye Moody's gaze and his Dark detectors. You'll also need to avoid the creatures he controls using the Imperius curse. The longer you remain undetected, the more points you earn! You'll gain extra points for picking up special items in his classroom.