Izuku Midoriya was born around the time when quirks first appeared. He possessed a powerful quirk called "Vampire". This quirk was a combination of classic vampire abilities and the unique power to permanently acquire and stockpile the quirks of his victims through their blood. As a result of this quirk, Izuku became an enigmatic and formidable figure capable of wielding a vast array of powers. However, he was also burdened by his insatiable thirst for blood and vulnerability to holy weapons. Over the years, Izuku grew stronger and collected a vast array of quirks. He also established a criminal empire called the "Sons Of The Blood Emperor". This organization controlled much of the underworld to prevent innocent lives from being harmed. Izuku's empire would occasionally clash with All For One's empire. Despite loathing and respecting Izuku, All For One personally tried to destroy Constantine and his empire. However, this led to a one-sided massacre where Izuku drank All For One's blood and gained his quirk. All For One managed to escape, but he remained incredibly wary of The Sons of The Blood Emperor and The Blood Emperor himself.