The originally powerful demonic summoning skill was reduced through a system bug to the blood pool summoning skill, much to the chagrin of Song Jian;
In reality, what Song Jian didn't know was that given his current physical condition, even if he had acquired the demonic summoning skill, he couldn't summon demons from the depths of Hell. To summon demons from Hell, a contract with the demon has to be made first. Given the powerful strength of demons, Song Jian couldn't possibly coerce them into forming a contract by force. Therefore, even if he had the demonic summoning skill, it would remain unused for a long time;
