Bad Paper said:I would call it 100,000gp. It's uniquely powerful, and deserves a little surcharge. Maybe for all the pretty emeralds on it or something.
I allow rings a little more power, to make up for their limited slots and higher-level requirement to take the feat. Often for other doodads I will require two item creation feats (e.g. a "potion" of Restoration (1500gp) can only be made with both Brew Potion and Craft Wondrous Item).KarinsDad said:WotC only disallowed personal spells in Potions, but I think that they should seriously be regulated in Rings and Wondrous Items.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.