[AUTO]:Forerunner
[AUTO](RC):When an attack hits a vanguard during the battle that this unit boosted ([Boost]), choose one of your rear-guards with "Duo" in its card name, and you may return it to your hand. If you do, reveal seven cards from the top of your deck, choose any number of cards with the same card name as the card returned from among them, put them into your hand, and shuffle your deck.