Knight of Rebuking, Duidelijk

[AUTO]:When this unit is placed on (RC), [COST][Counter-Blast 1], look at the top five cards of your deck, choose up to one card with "Youthberk" in its card name from among them, reveal it and put it into hand, and shuffle the deck. [AUTO](RC):When this unit attacks, if you have a grade 3 or greater vanguard with "Youthberk" in its card name, this unit gets [Power]+5000 until end of turn.