"Use this opportunity to target the rewards that you need to strengthen your roster. You can save your favors and enter any quest you’d like multiple times, so you can choose the Quest that is best suited for your needs and your roster!"
So these rewards are each day. Can we do all difficulties each day, or we can only pick 1 difficulty each day?
Excellent question, my friend. Each Favour grants you access to one Difficulty, and can only be used once. You may compile the Favours you receive to be used at once, if you wish. But remember, each Favour can only be used once! Make wise choices, folks! Enjoy the event!
Comments
original message from main announcement
"Use this opportunity to target the rewards that you need to strengthen your roster. You can save your favors and enter any quest you’d like multiple times, so you can choose the Quest that is best suited for your needs and your roster!"
Also
https://forums.playcontestofchampions.com/en/discussion/214277/side-event-multiple-times#latest