Interdimensional Dragon, Mystery-flare Dragon (F)

(This card cannot be in your main deck) Stride (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] Stride this card on your (VC) from face down. (When this cards Strides, it gains the power and name from one heart. At the end of the turn, return it face up.)
[AUTO](VC):[Counter Blast (4)] When this unit's attack hits a vanguard, you may reveal the 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.