Walkthroughs for custom maps.

I don't know what the hero looks like to the AI enemy when under Invisibility, but I do know how the effect of Invisibility is displayed when viewing the hero's army. For clarity, here's a screenshot:
1 - the hero's actual army;
2 - Invisibility is applied (no air magic or basic air magic);
3 - Invisibility is applied (advanced or expert air magic).
Now, pay attention, QUESTION: what is that strange thing in the 3rd frame, where is the logic of enhancing the spell's effect, and what does it lead to in the actual game? Will it help the player or, on the contrary, hinder them? :confused: