Demon invasion.

An impossible campaign. Started on Veteran difficulty. Everything was going well. There were no spells used, but I built all the creatures, except for the devils. Somewhere in the middle of the third month, Alastor arrived and started attacking me. He wouldn't have caused any problems if it weren't for the meteor shower that wipes out 6 Pit Fiends at a time for 110 mana. Anyway, I lost. And that was just the blue player... It's too hardcore. Some neutral creatures are bewildering. They don't guard anything valuable, but their strength...

Added 1 minute ago
Sigrif's magic needs to be restored to its original power. Otherwise, it just won't work. Note that this is Veteran difficulty, not Hero difficulty.