Kapitel 578: Chapter 578: Invitation

The lightning core grew a second time with another absorption, but that wasn't the end of it. Since it still wasn't double the size, Lucifer kept throwing more and more abilities to the lightning core without stopping. 

The more he tried, the more tired he became. However, it finally happened. After he sacrificed his 200th core to the lightning core, the core finally reached the threshold and even crossed it!

At one moment, Lucifer was even sure that it wasn't going to work. When he had tossed the 100th core, the lightning core was just a tiny bit away from the threshold, but that threshold was the hardest. 

He had to toss another hundred cores just to break that threshold since he didn't want to give up. He had already decided that he wasn't going to believe this diary if the 200th core didn't work either. Fortunately, it did.