Luck Stone of Tymora

This six sided die appears to be made of polished hematite. Each pip of the die is represented by a symbol holy to Tymora. Legends say that owners of these magic items whom displease Lady Luck may suddenly find the benefits of this item reversed. Or worse. 

As long as this magic stone is on your person, you gain a +1 bonus to ability checks and saving throws and gain advantage for any rolls involving Gaming Tool: dice set. 

In addition, once per long rest you may choose to reroll any single saving throw, attack or skill roll. You may choose to do this after the roll is made but before the results are determined. 

Notes: Bonus: Ability Checks, Bonus: Saving Throws, Bonus: Initiative, Buff