Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by having 6 or more Insect monsters in your GY. You can only Special Summon "Perfect Eclosion - Perfectly Ultimate Great Moth" once per turn this way. If this card is Special Summoned: You can return as many cards your opponent controls as possible to the hand, then if you have a Normal Monster in your GY, you can make this card gain 300 ATK for each Insect monster in your GY. Each time your opponent Normal or Special Summons a monster(s): All monsters your opponent currently controls lose ATK equal to their own Level x 100.