Punishment.

"As part of your exile, and your punishment," My father paused and looked down at me from his throne, I looked up at him, sneering.
"You will be stripped of your Godly powers, a spell will be placed on you that you have to break, and you will live on Midgard with Thor and the Avengers for a year, and you will help rebuild what you have destroyed."
Anger flared in my chest, this was going to be a long and painful exile.