Nếu hiệu ứng thứ hai của Mirror Resonator được kích hoạt, nhưng Book of Moon là chain để bản thân Mirror Resonator đang ở Tư thế Phòng thủ úp khi hiệu ứng này thực thi, thì hiệu ứng có áp dụng không?

Spell Quick

Target 1 face-up monster on the field; change that target to face-down Defense Position.

LIGHT 1

If your opponent controls a face-up monster(s) that was Special Summoned from the Extra Deck and you do not, while this card is in your hand or Graveyard: You can Special Summon this card, but banish it when it leaves the field. You can only use this effect of "Mirror Resonator" once per turn. Once per turn: You can target 1 face-up monster your opponent controls; treat this card's Level as that monster's original Level if this card is used for a Synchro Summon this turn.