Several hundred years passed in the blink of an eye for the Heaven-Connecting Devil Lord, Lü Song, and Lu Xiaotian alike. Throughout those centuries, Lu Xiaotian repeatedly tried to fully merge with the formation. He still hadn't quite succeeded, but he had made some progress. At the very least, he could now use the Maha Buddha Seal and the Futu Dharma Image to merge with the grand formation to a certain extent, even without using the relic as a bridge. The fusion simply wasn't as complete as it was with the relic.
This meant Lu Xiaotian could draw on more of the formation's power. Though he still couldn't bring Lü Song or the Heaven-Connecting Devil Lord into the grand formation, Lu Xiaotian had originally only stood a chance against Golden Immortal-level experts from within it. Now he could leave the formation and operate within a range of three hundred li. His power was somewhat diminished there, but it was still far better than before. As for dealing with those Golden Immortal-level fiends, it made little difference to Lu Xiaotian whether he was within a few hundred li of the formation. As long as his opponents didn't enter it, he could only protect himself to some extent; he still couldn't threaten experts of that caliber.
But for Lü Song and the Heaven-Connecting Devil Lord, it was crucial that Lu Xiaotian could unleash power beyond the limits of the Heavenly Immortal level outside the formation.
In truth, as Lu Xiaotian's fusion with the grand formation deepened, it wasn't impossible for him to bring others inside. The problem was that he could only constrain the formation to a limited degree. The Heaven-Connecting Devil Lord and Lü Song were both still too weak. Even if Lu Xiaotian weakened the formation's power to some extent,