Unfortunately, most of the people in cold-blood Hall cultivated the mentality of blood. A few of them cultivated the mentality of tools, which was not of much use to Lu Ming. It did not improve his mentality at all.
After devouring a huge amount of energy, Lu Ming's cultivation level was rapidly increasing. However, when he reached the peak of the fourth level of the spiritual God Realm, his cultivation level stopped. No matter how much energy he refined, he could not absorb it. It could only dissipate and be wasted.
Because the essence realm of heaven and earth did not improve, his cultivation was stuck.
In the end, Lu Ming decided not to devour the vital essence and energy. He only devoured the blood essence to improve his Blood Meridian.
However, Lu Ming had continuously devoured the blood essence of more than a dozen eighth and ninth level spiritual God Realm experts, and even perfected spiritual God Realm experts. His bloodline did not improve at all.