The difficulty of the Doomsday Blade in Heroes 3 could be adjusted. In the game, players could choose different races and characters to challenge different levels of difficulty. The difficulty of different levels would vary according to the strength of the enemy, the consumption of resources, and the difficulty of the battle. In addition, players could also adjust the difficulty of the game through some settings, such as using specific skills or props to reduce the strength of the enemy or increasing the number of their own characters to increase their survivability.