Uninvited guests.

Good lord, I was so annoyed that I had to register just to comment.

I killed a Necromancer, and 2-3 days later, he's attacking me again. I had 500 archers, now I have 700, and the rest of the army has increased in the same proportion.

"________"

If you consider the map as an endless sandbox, it's fun, but the map's objectives are simply impossible to complete.

After losing for 6 months on Veteran difficulty, I gave up and started a new game on Warrior difficulty – it's even worse.