نيروي، تابع مرآة الحلم

If a "Dream Mirror" monster(s) is on the field: You can Special Summon this card from your hand, then, you can make this card become DARK. If this card is Special Summoned by the effect of a "Dream Mirror" monster: Activate this effect; if "Dream Mirror of Joy" is on the field, you can return 1 Spell/Trap your opponent controls to the hand, also, after that, if "Dream Mirror of Terror" is on the field, draw 1 card, then shuffle 1 card from your hand into the Deck. You can only use each effect of "Neiroy, the Dream Mirror Disciple" once per turn.