Hero Level Upgrades
A hero can become stronger by gaining EXP through two methods:
１.Gaining EXP through winning Adventure Mode 2. Consuming EXP Potion.
The maximum level for a Hero is 40. Any extra EXP gained after the max level will be converted into EXP potions.
When a hero reaches Levels 10, 15, 20, 25, 30, and 35, breakthrough potions are required to continue upgrading your heroes.
They are priced in incremental amounts per purchase. It resets on 0:00 UTC per day.