"HW rulez" mod (add-on) for HoMM3.

What’s wrong with that?

well... not that there's anything wrong with it. It just changes the game's dynamics. For example, 3 rebuilds will consistently give you all the spells of the first level, because spells are not repeated during a rebuild.
There was a discussion about this in the thread about rebuilding, where there was more dissatisfaction (at least that's how it seemed to me). So, for starters, I decided to make a more conservative version.
The rebuilding rules can always be changed if necessary.

Added after 22 hours 55 minutes

I re-uploaded version 1.38. I removed the test message with a number when creating a new map.