The first stage of the tournament "named after Van Kanigem"

I also have a question...
Is it impossible to buy back heroes who died in battle at all? Or only on the same day (i.e., the day of their death)? And how should one approach the hit-and-run tactic then, since I don't know if the hero has already died or not...

:) That's exactly what I want to say. Someone might not pay attention and accidentally buy them back, which is quite possible. Someone might do it out of ignorance, and someone might do it intentionally. They banned it, but how do you check? Theoretically, you can check, but how much time would that take? It's impossible to check all saves for all players. I wouldn't bother with the bans. Everyone has limited funds, and buying a hero back multiple times in one turn is very expensive, especially with troops. So, if someone can afford it, why not? Fewer problems with checks, and all players will still be on a level playing field.
P.S. What if you suggest not allowing players to buy back more than one hero per turn? Explanation: In one turn, I can buy 5-7 heroes. I can move their troops to the Fortress. Then I buy the eighth, and I move them all out. The last one takes all the troops (a significant number). What's the point of buildings in the Fortress, etc., then? What do you think? The only problem is where to get so much money