bonchik
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The map features mentors. Therefore, you can purchase upgrades to suit any taste for all heroes.
This is only possible in version 3.0, where you can stop heroes for a single turn. In 3.1, you will have to fight fairly.
I'm curious how to change the upgrades for ALL heroes if, after exiting the dungeon, you can no longer return to it? In 3.0, you can't stop Kujin on a hero, but I remember being able to stop him on a recruit.