Genesis Dragon, Excelics Messiah

-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. :[ 1 & Choose a face down card named "Genesis Dragon, Amnesty Messiah" from your G zone, and turn it face up] When this unit attacks a vanguard, if you have a face up card named "Genesis Dragon, Amnesty Messiah" in your G zone, you may pay the cost. If you do, choose any number of locked cards, and unlock them. All of your units unlocked with this effect get Power+3000 until end of turn. Retire all of your opponent's units unlocked with this effect. If the number of units unlocked with this effect is three or more, this unit gets +1 until end of that battle.