there should be a spell that casts a fog in the radius of this spell. the fog will make the troops inside partially invisible, which will make defenses make only 50% of their shots. mortars and wizards will miss shots, but the splash damage can damage any troop inside that happens to be at the targeted spot. single target towers on the other hand, if they miss, their projectiles wont hit any troops, they will just vanish if they miss. what do you guys think?

