[AUTO]:When this unit is rode upon by "Sorrowful Ardent Light, Youth", [COST][Soul-Blast 1], look at the top five cards of your deck, choose up to one card from among them and reveal it, put it into hand if it is a card with "Youthberk" in its card name, and call it to (RC) if it is a grade 2 or less unit card. Shuffle the deck.