We get events where we can get extra rewards (not for less energy though?), but grinding for scrolls for one champ per run, and no chances of shards, is a rip!  

Why not have a week/weekend, every now and then, where EVERY champ in your Minotaur team recieves their own scrolls?!  3 champs getting 12 red scrolls in one run, but for the same amount of energy?!... now THAT would feel rewarding.