The monster is sucking up all of the blood in his veins. He's collecting it so that he can use it to regenerate himself. The speed of his regeneration gets a "a" , which means that it's not as fast as it used to be. The narrator tells us that the monster is called magia erebea, or "the ultimate immortality spell" . It's a kind of spell that allows you to live forever. The first version of the spell was called dark evangel, and the second was called master mage. The master magi was the apprentice of the first one. The second one was called magister, and it was the master of the second one. It was a battle between the two. The monster was so powerful that he commanded a thousand monsters to destroy everything in their path . They're going to kill the monster now.