He nodded. "That's right. The Cornerstone protects the Castle from Darkness, so there shouldn't be any Heartless here. The only way to bring them here is to attack the Cornerstone in the past, when it was unprotected. So if we're going to get rid of the threat, we have to go to the past, too, just like whoever did this."

King Mickey looked up at the doors leading to the Timeless River, memories of that time rushing back to him in a dizzying flood. He walked up to them and glanced back at the others. "You guys ready?"