text: If multiple effects modify how damage will be dealt, the player being dealt damage or the controller of the permanent being dealt damage chooses the order to apply the effects. For example, the ability of Decorated Griffin says “Prevent the next 1 combat damage that would be dealt to you this turn.” Suppose you would be dealt 3 combat damage and you activate the ability of Decorated Griffin. You can either (a) prevent 1 damage first and then let Dictate of the Twin Gods's effect double the remaining 2 damage, for a result of being dealt 4 damage, or (b) double the damage to 6 and then prevent 1 damage, for a result of being dealt 5 damage.