Scripts

Perhaps the hero didn't have enough mana at the time of the test with the tome?

Hmm, that's strange. My script is written so that mana for the spell is given first, and then the spell itself is cast. For some reason, if the hero doesn't have enough mana for the spell at the beginning of the battle, even after the mana is given, the game doesn't cast it.

Added 18 minutes later
In general, I added mana to the preparation stage, now it works even if the hero has 0 mana before the battle.