Genesis Dragon, Flageolet Messiah (SP) (G-BT08/S04EN) (G-BT08)

[Stride]-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.
[AUTO](VC): [Counter Blast (1) & Choose a face down card from your G zone, and turn it face up] When this unit attacks, you may pay the cost. If you do, choose up to two locked cards for each face up card named "Genesis Dragon, Flageolet Messiah" in your G zone, and unlock them. If the number of units unlocked with this effect is one or more, choose any number of locked cards, and those cards cannot be unlocked during that player's next end phase. If a total of three or more units were unlocked with this effect, this unit gets [Critical]+1 until end of that battle.