Gambler's EightLevel 14 Uncommon

This eight-sided die, carved from tourmaline, is painted with dwarven runes.

Wondrous Item        21,000 gp

Utility Power Daily (Free Action)

Trigger: You make an attack roll, a skill check, or an ability check and dislike the result.

Effect: You add 1d8 to the triggering roll.

Published in Dragon Magazine 417.