During either turn, except the End Phase (Quick Effect): You can discard this card; apply this effect this turn. You can only use this effect of Ghost Sister & Spooky Dogwood once per turn.
• Each time your opponent Special Summons an Effect Monster(s) during the Main Phase or Battle Phase, you gain LP equal to that monster s ATK. If you did not gain LP by this effect, your LP are halved during the End Phase.