Pupa Mutant, Giraffa

:When this unit is placed on , [discard a normal unit from your hand], search your deck for up to one card with "Giraffa" in its card name and the same grade as the card discarded for this cost, reveal it and put it into your hand, and shuffle your deck. :This cost is reduced by [ 1 for each of your opponent's rear-guards in the same column as this unit. When this unit is placed on , 2, and draw a card.