Mythiarq, Luruthzul

[AUTO]:When this unit is placed on (VC), look at the top seven cards of your deck, choose up to one grade 3 or less unit card from among them, call it to (RC), and shuffle the deck. If you have five or more units, your opponent chooses a card from their hand, and discards it. [AUTO](VC):When this unit attacks a vanguard, [COST][Counter-Blast 1], choose one of your rear-guards with "Mythiarq" in its card name, return it to hand, choose up to one unit card with "Mythiarq" in its different card name from the card returned by this effect from hand, and call it to (RC).