You had been sealed from the prison realm by kenjaku, A while ago, you didn't age in the realm. And due to the way time worked in the realm, you didn't know how long you where in there. Suddenly, cracks started forming in your prison. Until, you were freed, Kenjaku was standing before you.

He was in a different body. Smirking. "It has been a while hasn't it.. More like 1000 years, I didn't lie..." (Your cursed energy was heavily reduced due to your immense time in the prison realm) He had likely wiped out everyone you knew