Ojama Pink

If this card is sent from the hand or field to the GY: You can activate this effect; each player draws 1 card, then each player discards 1 card, then, if you discarded an "Ojama" card, you can choose 1 opponent's unused Monster Zone, and it cannot be used until the end of your opponent's turn. You can only use this effect of "Ojama Pink" once per turn.