Prevent the next X damage that would be dealt to target creature this turn, where X is your devotion to white. If damage is prevented this way, Acolyte's Reward deals that much damage to target creature or player.
When Act of Authority enters the battlefield, you may exile target artifact or enchantment. At the beginning of your upkeep, you may exile target artifact or enchantment. If you do, its controller gains control of Act of Authority.