Walkthroughs for custom maps.

I also encountered something similar in battle. It's related to the swamp.
By the way, it's on the Chinese map.
I'm in the Castle, I've stocked up on swamps. I'm standing in the corner, waiting for the reinforcements. And the game is NOT RUNNING!

A similar story with the reinforcements and attacking/defending the Castle, when at the end, let's say, if the computer has 4-5 stacks and summoned elementals, then everyone moves without exception. But as soon as one of the stacks decreases to x-size (a one-shot from our archers), the stack simply freezes and defends. There isn't much logic in this. It's not very useful, I just noticed this fact. It's especially interesting if this happens in the defensive moat of the Castle. Then the computer freezes there and dies after x rounds.

Added 2 minutes ago

and there's another trick when attacking the Castle:
If there's even a small stack of Archangels and they have the first speed, then by pressing "wait," the computer likes to cast Blind on these Archangels. Basically, if this is the only stack and the towers are awake (Kata is dead), then this is a simple and quick way to leave the computer without mana and doesn't even require dispel)

If I remember correctly, this trick can be used in the final battle on the First Blood map. There, the computer has immense power in the dungeon, and we won't have enough mana in a fair fight. But precisely because of blinding the Archangels, the computer loses all its mana. And it can't be said that the stack of Archangels is small; there are just more than enough Black Dragons there