Originally Posted by
RandomUser
Trial difficulty is proportional to both the level trial you select, the stage of the trial you're on, and your PvP strength - a combination of hero strength and weapon attack. As you get better weapons and more hero strength, trials get harder.
Within that framework, there is also a small amount of random variability that Gree throws in to keep things from being constantly the same. You may face some mobs with more health, but lower energy per hit, or lower health but more energy... or just more mobs.