Izuku Midoriya’s quirk; One For All. Transferred to him from Toshinori Yagi (All Might), Izuku's Quirk allows him to stockpile an enormous amount of raw power, allowing him to significantly enhance all of his physical abilities to various boundless levels. This results in unbelievable levels of strength, speed, stamina, agility, and durability. When Izuku activates One For All, red, vein-like lines course throughout the empowered part of his body.