Why don’t you offer One of those special prizes when you completed A quest Without using the heroes special powers (like the xp quest )
What special prize are you talking about?
It would be very interesting from a game perspective to have to reach special conditions, like no specials being used, not gettin any damage from the enemies or maybe winning with only 1 or 2 heroes etc. but I think it would be difficult to balance between stronger and newer players in seasons stages… maybe if it is in quests where the difficulty rises and you could have a chance for an extra reward if some conditions were made…
EDIT: Thinking of it… I would love having them for game missions. With avatars as a reward and maybe some diamonds or other prizes… for example “defeat 150 season 2 stages without using specials” etc… would make farming far more interesting and engageable!