As the Protector of Dragon Transformation Sect, Lu Ran was well aware that he couldn't escape being tracked.
After trying several times and realizing that he couldn't shake off his pursuers,
he had no choice but to take a risk and abandon his original body, seizing the body of a Scale Frog Alien Clan first-order Magician.
Whether a Human Cultivator could seize the body of an Alien Race was something Lu Ran himself didn't know, but he had no other choice at the time and had to take the risk.
Fortunately, he gambled correctly, successfully devouring and merging with the soul of that Scale Frog Clan Magician and taking over his body.
Since he had abandoned the body in which he had cultivated the Secret of Dragon Transformation and had burned it, the Elders of Red Dragon Hall who tracked him through the blood of the same dragon naturally assumed he had died in Dragon Abyss Marsh.