The successors of the Black King, also known as the executors, were mostly those who were filled with grudges and resentment against their worlds. Only then would they be able to lead the world to an end. Destroying the world you lived in with your own hands was no easy feat. One had to have the resolve, in other words, motivation and psychological mechanisms, to go against the resistance of those who opposed you. 

‘The fact that he appeared here means that he still has a lingering attachment to this place,’ Yeon-woo thought to himself.

Yeon-woo and Yvlke had different origins and identities, but at the bottom of it all, they were nearly similar. It was because they were both categorized in the same concept of “the Black King.” Not only that, but their legends and darkness had been mixed when they fought in the abyss. Yeon-woo thought of all the beings in this dream, he was the closest to Yvlke, but he was also the furthest from him at the same time. They were like the North and South...