Cristiano Crystal Shoot!
■ You may only cast this card during your opponent's final phase, if you did not take damage during your opponent's turn, you have a «Prism Dragon» on your center, and your opponent's life is 4 or less. ■ [Cast Cost] [Pay 2 gauge] ■ [Counter] Deal 4 damage to your opponent!! This card cannot be nullified and the damage cannot be reduced. If your opponent's life would become 0 by this card, it cannot be changed.