:When this unit is rode upon by "Blitz Head Researcher, Uber", 1, search your deck for up to one Product card with grade less than or equal to your opponent's vanguard, reveal it and put it into hand, and shuffle the deck.
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Official Q&A (5)
Q9727 ·
Q. How long do the cards revealed by card abilities or costs remain revealed?
A. After completing processes such as checking the information of revealed cards, the cards are returned to their original state. Additionally, if the revealed cards are moved to another zone, their revealed status ends.
Q9726 ·
Q. When searching for a card in the deck, what should I do if there are no cards in the deck that match the criteria or if the desired card cannot be found?
A. When searching for cards in a hidden zone such as the deck, it is possible to choose not to retrieve any card, regardless of whether an applicable card is actually present. In this case, proceed directly with the subsequent instructions as indicated.
Q9724 ·
Q. Can I use an AUTO ability twice during activation "When OO", if I paid the cost twice?
A. No you cannot. AUTO abilities can only be activated once during "When OO" timings. Costs can only be paid once for one activation.
Q9886 ·
Q. For the AUTO ability with the condition "When this unit is rode upon by "Blitz Head Researcher, Uber", if I [Soul-Blast] this card to pay for the cost after being rode upon by "Blitz Head Researcher, Uber" and put it into soul, can I still resolve the effect?
A. Yes, you can.
Q9774 ·
Q. Does "Product" refer to cards that include "Product" in their card name?
A. To determine if it is a "Product", refer to the "Type" indicated to the left of the card name. Therefore, "Mobile Fortress of Obliteration, Freischutz Maximum" and "Extreme Satellite Weaponry, Euryanthe", which have 'set Order/Product" indicated to the left of their card names, are "Products".