One For All is a legendary Quirk and one of the most powerful abilities to exist in Horikoshi's My Hero Academia. This Quirk is known for having belonged to the greatest Hero who has ever lived, All Might, as well as his righteous successor, Izuku Midoriya.

Unfortunately, in the Final War of My Hero Academia, Izuku Midoriya sacrificed One For All in hopes of saving Shigaraki. In other words, One For All no longer exists in My Hero Academia. While this legendary Quirk may have vanished, there exists an array of other Quirks that have stepped in as a replacement, and they continue to inspire hope in the hearts of the citizens of Japan in My Hero Academia.

Most Quirks that could potentially replace One For All are usually extremely broken and versatile from the get-go. However, one underwhelming Quirk was able to achieve just that through the sheer effort and determination of its user. This Quirk is known as Permeation, and it's used by Mirio Togata, the new Number One Hero of Japan, who replaced All Might and his One For All.

Permeation allows Mirio to phase through solid objects. With that being said, this ability is extremely difficult to master and use . Mirio has to hold his breath while using it, and he loses his perceptive senses in the process, such as sight. However, the sheer fact of how difficult it is to use and how weak this Quirk is from the get-go only makes it that much more incredible.

Source link