Crystal Wing Synchro Dragon (Secret Rare)

1 Tuner + 1+ non-Tuner Synchro Monster s
Once per turn, when another Monster 's effect is activated (Quick Effect): You can negate the activation, and if you do, destroy that Monster , and if you do that, this card gains ATK equal to the destroyed Monster 's original ATK until the end of this turn. If this card battles an opponent's Level 5 or higher Monster , during damage calculation: This card gains ATK equal to the current ATK of the opponent's Monster it is battling during that damage calculation only.