I ran the Harvestshield Mountain challenge 30 times. With an average of 6 mins for the full clear, this took 3 hours. 3 hours and 90 rolls later, I still didn’t the one roll I needed. I understand the rng gods are sometimes not on your side, but this is incredibly frustrating.
It would be nice if players had the option of choosing the reward after 5 or 10 completions. It would be easy to implement a dungeon counter specific for each challenge.