Blue Deathster, "Dark Verdict" Findanis

[AUTO]:When this unit is rode upon by "Blue Deathster, "Heavenly Death Ray" Stelvane", if your soul has a "Blue Deathster, Sora Period", search your deck for up to one grade 1 Strategy card, reveal it and put it into your hand, and shuffle your deck. If you did not reveal a card, you may call this card to (RC).