Shortly after falling into the Realm of Darkness, Aqua is swept away by a strange force. After waking up on a beach of a new world, she wanders around injured and weakened until she's found and taken in by the Midoriya's. She resolves to protect the world of heroes until she finds a way home to save her friends. When the time comes to leave, she leaves the world in Izuku's hands.

Sam and Dean are just vessels right? Right?

In 2009, Castiel watches the Apocalypse end disastrously and makes a decision. In 1984, John Winchester suddenly finds himself with another little boy on his hands, one with dark, messy hair and sad blue eyes who won't leave John and his sons alone. AU.