Capítulo 51: Reincarnations and Warnings

"According to these books that Dietrich brought us from his father's hideout, the founder of the Southern pack made a pact with a supposed demon to give them eternal life, in exchange their blood was turned into a hazardous material with the potential to create zombies if consumed by other creatures. When the warrior found out about what their blood could do, they made it into a weapon and created an army of super beasts." Isaac explains, keeping his eyes on Emilia the entire time.