Royal Writ of Taxation

Activate only during your opponent's Standby Phase. Select 1 random card from your opponent's hand and look at it. Unless the selected card or a card with the same name is Normal Summoned or activated by the end of your next turn, inflict 500 damage to your opponent. If the selected card or a card with the same name is Normal Summoned or activated by the end of your next turn, you take 500 damage.