Combat scripts and battle management.

One of the possible axe-based methods, as I think, is to give the hero a corresponding artifact at the beginning of the battle and take it away at the end, but this probably won't work if the hero already has a slot for that artifact...

That is, initially, you need to give the creature more mana and take it away after casting.

Here, I meant an additional shot per turn, i.e., not 2, but 3 shots at a time, for example.

In this case, a simple assignment of the ATV position will no longer work correctly, and you need to calculate all the hero's and his opponent's abilities?