Sapo closes to the location she thinks the dragon is, and lets go a powerful blow. It surely connects with the thick skin of the dragon, most accurately, the dragon's limb. The blow was accurate, as it hit a chakra, making the limb go numb, and making the dragon loose it's footing. On the same movement, Sapo sprints back into the light.
OOC: Move to M2, attack and shift to O2 as part of the attack. Critical hit! The dragon takes 32 dmg and is knocked prone.