Face of the Cosmos: This mask, made of a beaten copper-mithril alloy and set with a constellation of seven variegated semi-previous stones, is made to cover the right half on an individual's face. A set of three chains circle round the back of the head and fasten the mask by resting over the cheekbone, the bridge of the nose, and the chin.
Any creature wearing the mask feels a sleight tingling sensation in the skin it touches, and has the sensation that he sees sharper, more precise details with the eye looking through the eye hole.
Once per day, the wearer of the mask may reroll any one Intelligence based skill roll.
Minor divination; CL 3rd; Craft Wondrous Item, true strike; Cost 1,000 gp
NPC Gear: 3rd
Treasure Value: 4th
At some point I determined that a re-roll was worth as much as a weapon bonus. A properly used mulligan, after all, can change the course of a game. I decided to price combat re-rolls (to hit rolls or saving throws) as if they were a weapon bonus (a +1 enhancement for each re-roll allowed in a day) and a non-combat re-roll as if it were an armor bonus (as they had less effect in the overall flow of the game). The number of re-rolls would be squared and then multiplied by 2,000 gp (for combat re-rolls) or 1,000 for non-combat re-rolls.
This item is 1*1*1,000 gp.