Lind found the tunnel as in bad of shape as Amares had described. It was fractured and broken not just by the passage of time but he saw clear inscriptions of formation arrays. The wyverns had been formation masters!
Aether beast formations were distinctive enough to stand out to him but he grasped a bit of what they did. Reinforcing the tunnel was but one part of it. He thought he saw a few Wind Laws carved into it as well.
The collapsed areas were impossible for a large dragon to pass easily but he noticed old blood stains that had to be from Amares. Had he tried to flee from the blood ceremony that way? Clearly it had failed.
Lind did not take chances as he engraved sigils into the air before placing them on the walls. He did not repair the existing damage but used it to hide the glow of his Qi. If any of the dragons did try to come from behind him, they would not survive. Only Amares and the woman could at the moment.