The secret realm was massive, and it would take at least half a month for Lin Yun to search the entire place. Lin Yun looked around and was at a loss.

Closing his eyes, he allowed his sword intent to spread out. His xiantian sword intent had already reached complete mastery and was usually more useful than his eyes. It could allow him to detect danger in advance along with detecting small differences.

Suddenly, Lin Yun opened his eyes and his pupils flashed coldly. He could sense a faint threat with his sword intent along with a great pressure. Looking into the distance, the Azure Dragon Mark bloomed on his chest as his muscles tensed up. He could faintly sense a terrifying existence in the distance.

He knew that it must be the core region...