Nightmare Pain

During your Main Phase: You can destroy 1 DARK monster in your hand or face-up field, and if you do, add 1 "Yubel", or 1 card that mentions it, from your Deck to your hand, except "Nightmare Pain". You can only use this effect of "Nightmare Pain" once per turn. While you control a "Yubel" monster, your opponent's monsters that can attack must attack "Yubel" monsters. Your opponent takes any battle damage you would have taken from battles involving your "Yubel" monsters.