Curse Your Opponents With Curse of Fiend One of my favorite Yu-Gi-Oh cards, Curse of Fiend. You can only play this card during your standby phase, but its worth it. It switches all the monsters in Attack mode to Defense and visa versa, and you cant change them during that turn. So switch your monsters to Defense mode and wait until next turn in your Standby Phase. You can switch a Labyrinth Wall in defense mode to attack mode, kill the Labyrinth Wall, and get direct damage. Or you can kill a card like (Toon or non) Summoned Skull, or other cards with low defense points and high Attack points. You can destroy your opponents life points and a few of their best monsters. If you want this card, it is in the Magic Ruler set. Kit C. , signing off! By: Kit C.