Blue Storm Marshal Dragon, Admiral Maelstrom

(Released when both players' vanguards are grade 3 or greater!)-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] this card on your from face down. :[ 1 & Choose a face down card from your G zone, and turn it face up] When this unit's attack hits a vanguard, if it is the fourth battle of that turn or more, and if you have a heart card with "Maelstrom" in its card name, you may pay the cost. If you do, draw a card, choose three of your opponent's rear-guards, your opponent chooses a rear-guard from among them for each face up card named "Blue Storm Marshal Dragon, Admiral Maelstrom" in your G zone, and retires them.