Evil Armor Sovereign, Inverse Giraffa "Яeverse"

:When this unit attacks a vanguard, 1, your opponent chooses one or more cards from their hand, and call those cards to as . Your opponent's cards' abilities do not activate from this call. If the number of cards your opponent called is less than the number of grade 3 cards with "Giraffa" in your soul, [lock one of your rear-guards], and this unit. :When your opponent's rear-guard is placed during your turn, [lock one of your rear-guards], and all of your front row units get +15000 until end of turn.