Get Out of Jail Free

If you get 100% the game, you unlock a special mode that is outside of the main game called level rush. It's like to have a leaderboard for basically speedrunning only the levels. There's one rush for each character that is either all their side quests or the main quest and whatever. If you know what you're doing, then you can route the game specifically around using one of these cards to skip a huge chunk of a level.