Hyper Metalborg, Heavyduke

(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. : 2 When this unit attacks a vanguard, you may pay the cost. If you do, until end of that battle, this unit gets ":When this unit's attack hits, draw a card for each of your heart cards.". Then, if you have a heart card with "Metalborg" in its card name, until end of that battle, your opponent cannot call grade 1 or greater cards from hand to .".