Only then did Darius realize Teivel had been lying to him; the book was nowhere near satisfied with Darius’ supply of energy. However, things had already gotten this far. Therefore, Darius had no reason to give up.

He gritted his teeth and continued forcing out every last drop of life force in him. It was not long before sweat drenched him from head to toe. When he ran out of strength and wanted to give in, he felt a powerful life force gushing out from his sides—it was his life force.

It burst out of him, pouring into the book that then trembled fervently. Then, everything died down.

A frown marred Darius’ face as he finally understood what was happening. Gratitude swarmed his chest at that moment while he thought, “If not for Teivel, I wouldn’t have realized that I have such great potential.”

Teivel stood aside with a proud grin, his voice sounding lighter than before. “Good. That’s the end of our introductory lesson. As for the other eight life forces, you can obtain them from oth