Dark Sun - Destiny and sacrifice
Ring of foresight
A plain ring made of ivory
This ring has 5 charges. It lets the wearer peer into the immediate future. The wearer may reroll any failed roll(6-). He only use one charge per roll.
Ovid obtained this ring in Altaruk from an elven merchant by means of magic and trickery. All it cost him was an easily discarded house Tanixu member ring.