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 from face down.
:When this unit placed on , if you have a heart card with "Ancient Dragon" in its card name, choose one of each player's rear-guards, retire them, and increase this unit's by the sum of the original of the units retired with this effect until end of turn. Then, if the increased with this effect is 20000 or more, this unit gets [Critical]+1 until end of turn.