A lean camel is bigger than a horse

There were bursts of thunder in the sky, and the dark clouds became thicker and thicker. All the rolling power of heaven pressed down on the big dragon, suppressing it so much that the entire Jiaohong Gorge was shaken, and the pool of water below erupted with a roar that rolled and was deafening.
Soon, the third lightning condensed. This was the last of the three minor tribulations. As long as it could pass it, the big dragon would successfully complete its evolution.
But this calamity is...