Penguin Soldier of the Blue Storm Fleet

Wave-3rd time or more (This ability is active during the specified battles of each turn):When an attack hits a vanguard during the battle that this unit boosted ([Boost]), if you have a vanguard with "Blue Storm" in its card name, search your deck for up to one grade 3 card with the [Legion] ability, reveal it to your opponent, put it into your hand, and shuffle your deck.