An unique monster is a monster that cannot be placed into any monster category, making it one of a kind. They are not creatures from our world, some of them atack mortals, another don't ever touch them. They are old as the world and endowed with incredible powers. In Magicka, players will fight them "for the good of the Midgard" and sometimes receive a fraction of their power and get their help right in the battlefield. Use wisely!
Examples: Sapient Pearwood Luggage, Death, and another.