Approaching Fangs, Kheios

:[ 1 & Discard a card from hand], look at the top three cards of your deck, choose a card from among them and put it into hand, choose up to one unit card from among them, call it to , and put the rest into soul. :When this unit attacks a vanguard, if your soul has eight or more cards with different card names, choose one of your rear-guards, and it gets +10000 until end of turn. If your soul has thirteen or more souls with different card names, choose all of your rear-guards instead. (This card is a that seeks the Fire Regalis)