Is that the end, of our farewell?

-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] Stride this card on your from face down. :[Soul Blast (1)] When this unit is placed on , if you have a heart card with "Battle Sister" in its card name, you may pay the cost. If you do, look at the same number of cards from the top of your deck as the number of your units with "Battle Sister" in their card names, search for one card from among them, put it into your hand, and put the rest on the bottom of your deck in any order.