Each time a Shaddoll monster(s) is sent to the Graveyard by a card effect, place 1 Spellstone Counter on this card for each sent monster. All monsters your opponent controls lose 100 ATK for each Spellstone Counter on this card during your opponent s turn only. Each time you Fusion Summon a Shaddoll Fusion Monster, you can remove 3 Spellstone Counters from this card to use 1 appropriate face-up monster your opponent controls as 1 of the Fusion Materials.