What are you interested in, Dembel?

In the game, I captured a castle. Only a handful of warriors remain. I look at the map, and in three days' travel, there's an enemy hero and an army that's like a tractor – it will tear everything apart. Weighing the pros and cons, I decide to retreat. But as a last resort, I press a button on the game panel/in the spellbook and just stand still for the entire turn, from the very beginning of it. Is this what the mine prank looks like?

Evasion and Cover
The protection provided by walls and obstacles becomes more effective for friendly creatures.

I figured out that there's a dwarven castle there and started playing around with it.