Advanced format ruling
Cocoon of Evolution
Card effect (current official text)You can target 1 "Petit Moth" you control; equip this card from your hand to that target. While equipped by this effect, the original ATK/DEF of that "Petit Moth" becomes the ATK/DEF of "Cocoon of Evolution".
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.