Ring of Invisibility Negation (Magic Ring)

Some years ago, a wizard invented this ring because he disliked invisible surprises. When it is worn, the ring continually generates a powerful magical field 60' in diameter that negates invisibility within its confines. Any creature with natural or induced invisibility immediately becomes visible upon entering this field and remains so until leaving it. Furthermore, the creature becomes outlined in an eerie faerie fire, a green luminous light that gives opponents a +2 bonus to hit. The effects of potions of invisibility, dust of disappearance, and spells of invisibility are negated and dispelled as soon as the creature using them enters the magic field.
Potions, dust, or spells possessed but not being used will not be affected. The normal form of this ring is called the clarifier. In addition to this, there are two variations. The first, the killer, does 1d4+1 points of damage per round (no saving throw) to creatures in the magic field whose invisibility was affected. The second variation is the destroyer. It drains the magical properties of any invisibility-related device that remains in the magic field for more than one round. The magical item in question is allowed a saving throw vs. disintegration at +5 to avoid being dispelled. For random selection of one of the three rings, roll percentile dice:
Roll 	Ring
01-80   Clarifier	
81-95   Killer 	
96-00   Destroyer	
Category:Encyclopedia Magica Magic Items
Category:Magic Items
Category:Magic Rings