Shiroyasha2910
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Possible solution: temporarily add Knowledge to the hero, and after increasing the amount of mana, return the Knowledge to its previous value. Example:
ChangeHeroStat("Deleb", STAT_KNOWLEDGE, 10)
ChangeHeroStat("Deleb", STAT_MANA_POINTS, 100)
ChangeHeroStat("Deleb", STAT_KNOWLEDGE, -10)
I quickly checked it through the console. Yes, it works, the mana remains above the maximum value. For now, this is how it's done; perhaps someone knows how to do it with a single command.