Heroes 5.5 WarGame Edition - Tactical Edition.

M, temporarily deprive the hero of a model and an active tile?

A very stinky aura follows the hero ;) At first, "Haven" had no model, but it radiated so much....
And we'll have to discard the card where the opponent will be marked with a flag, like a radar ;) :)
What I suggested, discarding the hero into the mountains for the duration of the opponent's turn, is also not so relevant, because during his own turn, the opponent will see him.