1 Attack Position Pendulum Summoned Normal Monster + 1 face-up Defense Position Pendulum Summoned Normal Monster
Must be Parallax Summoned, and cannot be Special Summoned by other way. If this card is Parallax Summoned: You can add 1 Level 5 or higher Normal Monster from your Deck to your hand. If this card attacks or is targeted for an attack, negate the effect(s) of all monsters your opponent controls. Each time this card destroys a monster by battle or if this card would be destroyed by battle but it is not, place 1 Value Counter on this card. You can remove any number of Value Counters from this card; apply this effect, depending on the number of Value Counters removed. You can only use this effect of "Perfect Program" once per turn.
● 2 Counters: Add 1 Level 4 or lower Normal Monster from your Deck to your hand.
● 5 Counters: Target 1 Set card your opponent controls; destroy that target.
● 8 Counters: Target 1 monster your opponent controls; destroy it, also inflict damage to your opponent equal to half the destroyed monster's ATK.