البوابة آسرة الأرواح

Activate this card if you control no monsters and a Set Spell/Trap you control was destroyed by card effect this turn. During the Main Phase, if exactly 1 monster whose ATK is lower than your LP is Summoned and "Z-ONE" is in your GY: Destroy that monster, and if you do, take 800 damage, then inflict 800 damage to your opponent.