Take on the Ultimate Challenge: Abyssal Difficulty
Mythic or Legendary Hero Battles, as well as some Grand Hero Battles and Limited Hero Battles, feature a level of difficulty higher than Infernal: Abyssal. At this difficulty level, your foes will be stronger than ever. You'll need to unlock your Heroes' potential, refine weapons, inherit skills, and more to make your Heroes strong enough to take on these foes. You'll also need to make sure you have a good grasp of your foes' equipped skills, color affinities, effective skills, and so on.