You can return 1 face-up "Dark World" monster you control to the hand, except "Grapha, Dragon Lord of Dark World", and Special Summon this card (from your Graveyard). If this card is discarded from the hand to the Graveyard by a card effect: Target 1 card your opponent controls; destroy that target. If this card was discarded by an opponent's card effect: Look at 1 random card in your opponent's hand also and if that card is a monster; you can Special Summon it.