Amulet of Fortuitous Reversal

An amulet covered in 6 glowing runes (charges), each one corresponding to an attribute score (red strength, green dexterity, orange constitution, blue intelligence, purple wisdom & yellow charisma). When you see a creature within 30 ft. of you succeed or fail on a type of saving throw, you can spend a reaction to invoke the power of the amulet and expend the related charge to force them to reroll that saving throw, using the new result to determine if they succeed or not. You can not invoke the amulet to use this effect for that type of saving throw again until you recharge the amulet. The amulet regains 1d4 charges during a long rest. You may choose which charges are regained.