Uuu, I like this spell very much, good job! Effects are excellent, and as far as I can see coding is good (though I use JASS, so can't be all that sure

).
Now only thing I have to take back from the greatness of this spell xD, is the fact that if you have a unit in front of the caster, and you cast the spell, it will not consider the unit in front of you, but instead create a dummy unit behind the front opponent

.
I guess you increased offset somewhere a tad to much. Also try to make a better demo map and remove mask and fog of war

.
All in all, good job, liked it: 4.5/5