Li Lingtian had been waiting for the hidden person to appear.
If he didn't deal with this person, he wouldn't be able to leave in peace. Even if he left now, the Black Continent would be destroyed by others in the future.
This person was the original body of the Dark Nether Patriarch. He had killed the clone of the Dark Nether Patriarch twice, but the original body was clearly in the Black Continent, but he did not appear.
There had to be a reason. If they did not completely deal with the Dark Nether Ancestor, it would not work at all.
Moreover, killing the Dark Nether Ancestor could also be considered as establishing the Black Continent's prestige.
Although his reputation resounded throughout the Black Continent, if he left, there would be no peaceful days in the Black Continent.