Is it possible to create a duel mod for HOMM 3 where you select a hero, and monsters, abilities, and artifacts are automatically assigned in the background, and magic is also assigned? Basically, a script, map, or separate implementation in a browser/Java where there are only tactical battles (battle mode). Balance isn't important; it's just about the ability to fight.

As an alternative, a map with random heroes (monsters) standing near portals. I don't know if it's possible to set absolute randomness for the hero, including level, number, and quality of artifacts, monsters (also an option with mixed monsters from different castles), mixed abilities (necromancy only for necromancers)... in general, meet your fate (even with 1 peasant against the devil).

**Correction regarding the image with the one-way portal - only for single-player mode.

*No purchases, nothing extra. Just a horde against a horde.