You need to give your dummy unit's the locust ability. In their present state you cant see, target and select them. Adding this ability will fix all of that.
You need to clean up a few of your memory leaks. You need to nullify: tempPoint, dumyUnit, sCaster.
2 Soul Based spells. 1 spell spirals outward using those hands and the other spell launches 3 "shockwaves" out from the casters chest. The Soul Absorption spell is meant to be a high level spell as it has only 1 level. It damages and returns 30% of any unit caught in its wake's life to the caster. the other spell is meant for earlier use and suppoerts the adition of other levels. I also added an aura for kicks but that is not jass enhanced like the rest. These spells work with multiple heros casting the ability multiple times and will not leave nasty lag as each effect is a unit with a timer. Enjoy, let me know what you think.