Stuck in Story mode? Need to grind for some gear? Challenge mode is made to re-run through Story mode dungeons, with ever-changing paths to choose from, and loot to pick up. Clear the boss up to three times to earn dice to roll at the end of the Challenge. You'll get to select a reward from the ones presented to you.
Special challenge events allow you to win even more rewards, such as boosts to coins, gems, gear, and even hero XP!