Unrivaled Blood Master

I was a failure. A loser. A person who can't accomplish anything. A person who let his family die in front of him. Using the second chance I got, I swear I will pay all of what my enemies did to me ten-fold! "I am Arthur Twilight! I am a blood master and I shall fill this world with blood!!" - - - - - - - - - - - - September 6 of 2019, 12 years ago, magic beasts started pouring out of Magic Voids, wrecking havoc on Earth. However, with the emergence of magic beasts, magic beads also started appearing, with those magic beads, people also started getting powers, class, and status boards, just like in games. Classes like, Elemental Masters, Warrior Masters, and Dragon Masters are the most famous among all classes. Arthur, however, due to an unfortunate event, got forced to choose Blood Master, the rumored weakest class. Arthur wanted to prove that all classes are balanced, but failed miserably. From then on, Arthur regretted that he did that. However, when he heard something about "Cliff of Reset" that allows you to reset your class exchange for going back to Level 0, he was immensely happy. But things didn't go as planned, he went back to the past, 1 year before the Master Era happened, using his knowledge about the future, he will pave his path to become the strongest Master!!