In the Necropolises, I placed vampires. I upgraded them to level 3, and with 18 vampire lords, I broke the enemy's level 4 castle.
I took a couple of hives, converted skeletons, and ended up with 270 of them.
On day 127, I destroy a level 1 Utopia. They give wings! On day 131, a level 3 Utopia with a Knight's Hall and +3 to all stats.
Next, I double my mana and seize the central treasure (there are 4 hives, Boots of Swiftness, and Pandora's Box, covering the entire map). After that, on day 134, an Army of the Dead gathers in the Dungeon.
From days 135 to 141, Gunnar, with 4300 movement points, takes several castles, defeats the Utopia, and with a growing number of vampires, attacks Vistan with a powerful army.
Thank you for the game!