Let Poacher's Knife Smite Structures and create a fog of anti vision around Smited Jungle Monsters

It should be an Objective Smite item and not another "kill dudes or kill camps" since Trailblazer and Stalker/Skirmisher do those things already

Potentially have it deal less damage than other Smites but have far more objective control than any of the other upgrades. The smite against Structures should reduce damage dealt by them while also reducing their armor or possibly attack speed.