Noah's breakthrough was the result of his law. His ambition had empowered his cultivation level so much that he had advanced to the solid stage.
Of course, that was only a temporary boost. Noah would suffer a backlash when the effect of his ambition ended, but he was ready to endure it. He only wanted to have the power to face the Eternal Snake head-on.
The creature slithered right above the ground. Its skin didn't touch the terrain, but cracks opened anyway at its passage. The pressure generated by its aura and its quick movements were something that even the new continent couldn't endure.
The Snake didn't manage to sense Noah in the sky when he was still in the quasi-solid stage, but his complete breakthrough made his aura impossible to miss.