Interdimensional Dragon, Mystery-flare Dragon

(This card cannot be in your main deck) (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. (When this card strides, it gains the power and card name of one heart. At the end of the turn, return it face up) : 4 When this unit's attack hits a vanguard, you may reveal four cards from the top of your deck. If the revealed cards have four or more different grades, you may pay the cost. If you do, you get an additional turn. If you had revealed cards, shuffle your deck.