Advanced format ruling
Gradius' Option
Card effect (current official text)This card cannot be Normal Summoned or Set. This monster can only be Special Summoned by selecting 1 face-up "Gradius" on your side of the field. The ATK and DEF of this card becomes the same as the ATK and DEF of the selected "Gradius". If the selected "Gradius" is removed from the field, destroy this card.
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.