Capricious Darklord

During the Main Phase (Quick Effect): You can activate this effect; Tribute Summon 1 Fairy monster face-up. If this card is sent to the GY: You can make all monsters your opponent currently controls lose 500 ATK/DEF for each Fairy monster on the field, until the end of this turn. You can only use each effect of "Capricious Darklord" once per turn.