Code A Ancient Ruins
① If a face-up "Alien" monster(s) is destroyed, place 1 A-Counter on this card.
② Once per turn:
You can remove 2 A-Counters from the field;
Special Summon 1 "Alien" monster from your GY.
● If a Set “Alien” monster is destroyed by battle, you do not place A-Counters on this card.
(It needs to be face-up at attack declaration).