Advanced format ruling
Megamorph
Card effect (current official text)While your LP is lower than your opponent's, the equipped monster's ATK becomes double its original ATK. While your LP is higher, the equipped monster's ATK becomes half its original ATK.
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.