Lin Diyu was still very immersed in absorbing the so-called dark world core. He could feel that there was an immense improvement in his strength. From this point forward, he felt like he could already compete with his second junior brother, which was ridiculously strong. As the senior brother, he felt like losing out would be a taboo. He should hold his high up as the eldest among their group of disciples.
As he continued to consume the dark world core's power, he felt like the power inside this core originated from the Thanatos Bloodline itself. He didn't know but the power of this world core was so vast that he could probably not absorb it all in just a decade.
If others who yield the power of the darkness knew of such thoughts, they would probably explode in anger. Lin Diyu was already fast enough, evident of his continuously increasing strength.
Creation is hard, cheer me up!
Your gift is the motivation for my creation. Give me more motivation!