Card Rulings:Dice Re-Roll


 * You activate "Dice Re-Roll" before you activate the effect which will let you roll a die. Then you can use the effect of "Dice Re-Roll" once during the turn in which you activated it. When you resolve the effect, you negate the result of a die roll and roll again.


 * You can use a "Dice Re-Roll" to re-roll a die roll for an Archfiend.

If you negate "Roulette Barrel"'s die roll, you negate both rolls and must roll twice again.
 * You can use a "Dice Re-Roll" to re-roll a die roll during the Damage Step.