Eren took a heavenly oath in front of the man. However, he hadn't mentioned any timeline in his oath. He simply said that he was going to free her, but he didn't say that he was blind to free her right away.
In any case, he didn't plan to kill her. Even if the Celestial Lord couldn't descend into this world, he still didn't want to poke that person more than needed.
After Eren had taken the oath, the man had no other excuse. Even now, he was thinking if there was any other method to save the girl which didn't require his death. Unfortunately, he could see that Eren was carefully watching his every movement.
He had tried to convey a message, but the domain was preventing that as well. He couldn't even ask for any help. The domain had made things worse for him.
He really regretted the fact that he hadn't broken the domain before. He could do that now, but Eren wasn't going to allow any movement. Even if he broke the domain, what was the point if the girl was dead?
After running out of every other method, he came to a realization that he had no other option. He could only accept Eren's words and sacrifice his life to save her.
He took a deep breath and fell to his knees. "I accept."
The person that possessed immense destructive power was now lying on his knees in front of Eren. It was all because Eren didn't fight with him, instead going for his weakness.
In the first place, he wasn't planning to fight him properly. If the domain was broken during their battle, nothing could stop the Holy Priestess from finding out.
Just as the man wanted to avoid a battle to protect the girl, Eren wanted to avoid it to protect his domain. He also had to protect his clone which couldn't take any damage.
"It seems like you are very loyal to her. Or is it fear of the person behind you?"
Eren was quite curious about the identity of the Celestial Lord and what relation he had to the girl.
As per his rough estimate, the person was most probably similar to the goddess that was worshiped by the Holy Priestess. But he didn't understand why someone like him would pay attention to this girl?
He wanted an answer, but at the same time he was worried. Normally, villains die when they waste too much time talking. There was always something that went wrong.
"Level +1."
"Level +1."
He was at a stage where leveling up was harder. Each level increase required an immense amount of experience.
Despite that, he had managed to climb three levels after killing just one person. Looking at the leveling notifications, Eren was also pleasantly surprised.
He previously had a feeling, which was now confirmed. The person he killed was no weaker than an Overlord. If anything, he gave him even more experience than an Overlord might have given him, probably because of his origin.
Eren was feeling elated. He had finally crossed another great wall in his leveling. Finally, he was in the same realm as the four Overlords!
His stats had taken another qualitative leap, increasing by multiple times.
[Congratulations on taking another step in the path of a Conqueror]
[You have crossed level 50]
[You have been rewarded with bonus stats]
[You have been rewarded with a new unique rank bloodline skill]
As he crossed the fifth great wall in his leveling, he had also received a new skill, the notification for which appeared in golden words, appearing different from every other notification.
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It was called a bloodline skill, but he wasn't sure which bloodline it was related to. He already had skills for almost every other bloodline, except one...