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.
Relies on the original Gradius to be present on the field, otherwise this card is unplayable.
Gradius' Option can be special summoned into the field while Gradius is present on your side of the field. Gradius option receives the same total stats as the original Gradius, hence it would be better to equip the original Gradius with strong equip spells to fully utilize this strategy.