Blood Drops

"What is your request?" Asked Evan, watching Lilia fight.

"Very simple, I want to receive a liter of your blood every month for this year until you join the Demonic Tree." Calmly said Rave.

"Okay." Evan quickly agreed; he saw nothing wrong with that. Rave helped him, he gave him a great deal of information. Now it was Evan's turn to bring something from his side. Moreover, Evan had no choice anyway, Rave could kill him at any second.

Rave nodded and pulled out a small case-sized device from his inside pocket. He activated it and whispered something.

Evan asked, "Why do you want my blood? Are you going to use it for experiments?"

"Yes, I'm trying to make them stronger using monster blood, various plants, and even spells. The same ways I use to raise their survival rate by consuming monster blood. I've recently concluded that I should try using human blood as well, but special ones."