In Explore – Road to Transcendence, when it refers to a “maxed hero,” it typically means that the hero needs to be fully developed in several aspects:
Level: The hero should be at the maximum level allowed for their current tier.
Ascendence: The hero should be fully ascended, meaning they have reached the highest ascension rank available for their tier.
Skills: All skills of the hero should be fully upgraded to their maximum potential.
Head Soccer
So, for Stage 10 and Stage 20, ensure that your hero is maxed out in all these areas to meet the requirements.