The One Ring

Equipped Creature gains +3/+3, Hexproof and Protection from Creatures other than Wraiths.
Creature gets -1/-1 at the end of your turns.
If Sauron, gain +6/+6, Lifelink, Hexproof and Vigilance instead.
Cannot be re-equipped once cast.
If Equipped Creature is destroyed, The One
Ring goes into your Opponent's hand.
If this is destroyed, exile Sauron.