NHF – new heroes for Heroes V 3.1.

Scout - For a fee, he can place towers that expand his vision of the map.

This is more of a skill, like a special ability - not playable.

Added 5 minutes later
I suggest a simple thing:
Imagine the hero, imagine how he would play solo, compare him to other heroes, and see who would be preferable for gameplay. Think about how an opponent would fare against him.
It's not difficult, but it will immediately lead to the idea of a playable hero.