Card Rulings:Wanton Imperialism

TGC Rulings

 * Tributing a "Prince", "Duke" or "Monarch" monster is a cost. You can Tribute your opponent's monster with "Soul Exchange".
 * You can Tribute a face-down "Prince", "Duke" or "Monarch" monster.
 * You cannot activate "Wanton Imperialism" if you have no appropriate monsters that fulfill its conditions in your Deck.