The Magic Vice is an enemy from Final Fantasy IX. It can be found in the Burmecia Suburbs. They can be rather difficult to deal with when they use Magic Hammer to deplete a magic-using character's MP. When at critical health levels, the Magic Vice will often flee the battle.
Like the standard Vice, Magic Vice can steal items from the party with Mug. Any items stolen in this way are lost forever, even if the Magic Vice is subsequently defeated. This can be of considerable inconvenience if valuable and/or unique items are stolen, as the only way to recover these items is to load a previous save file.