Psixxx
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QwertyYou can only buy back and use your dismissed/killed hero the day after their dismissal/death.
Is it possible to buy back a dismissed hero on the day of their dismissal, but not use them?
I think it means that you can buy the hero on the day of dismissal, but you cannot move them on the map; you can only move them the next day.
Added 5 minutes later
Since I didn't receive confirmation from Sir Catch, I sent Qwerty the save file for confirmation.