Effects
Basic
Displays number of monsters in a wandering monster troop and whether or not the troop will offer to join the casting hero's army. Range is equal to power or three, whichever is greater.
Advanced
Same as basic effect, except an enemy hero's primary skill stats, and the composition and quantity of the hero's army can be viewed. Range is (power x 2) or three, whichever is greater.
Expert
Same as advanced effect, except an enemy town's statistics and garrison composition and quantity may be viewed. Range is (power x 3) or three, whichever is greater.