Masque of Hydragrum (DZ-BT06/045EN) [DZ-BT06: Generation Dragenesis]

Look at the top five cards of your deck, choose up to one unit card with "Dragontree" or "Masques" in its card name from among them, reveal it and put it into hand, and shuffle the deck. [ACT](Drop):If you have a grade 3 vanguard without "Masques" in its card name, [COST][reveal a grade 3 card with "Masques" in its card name from hand], and ride the card revealed for this cost as [Stand]. If you rode, put this card into soul, if your opponent's vanguard is grade 3 or greater, and you did not persona ride this turn, you activate persona ride.