Help Making Custom Trap Spells

i'm trying to make a Trap hero. His skills will be lightning ward *hehe lame* net trap * casts ensnare nothing special* Lightning ward is proving to be tough though. What i want it to do is every couple seconds *a random number between 2-5* its gonna pick every unit in a region that belongs to an enemy player. Picks 1- level of skill and shots chain lightning at them. I'm unable to set it to check the level of the skill. I can't any way to do this. I even tried creating a variable thats an integer and every time they invest a point into the skill it adds one to the integer. If you know how i could fix that i'd appreciate help. Also its not that odvious. I was on the spell editor for about 2 hours last night trying to get this to work. Hero skills variables or whatnot has to be defined to a blizzard spell no custom things. And i couldn't find any ability variable types. Thats about all i found. If you can figure a solution i'd be happy. Oh yeah this is 4 triggers 1 to turn on the spell another to deactivate it and one that checks every couple of seconds than one that sets the level of the spell.

The level of what skill? If it's the level of the ability that drops the lightning ward.... there are a couple ways to go about it...

1. make a different lightning ward for each level of the hero ability, and make a separate chain lightning ability for each of them.

2. make the lightning ward a hero and make a chain lightning hero ability and trigger it so when the lightning ward ability is used, it gives the lightning ward being created a number of skill points equal to the level of the ability (minus one, because heros start with 1 point) and learns lightning ward that number of times.

If it's the hero level of the casting hero, I think you're going to have to go with something more like the second option...

(EDIT) wait... why are you using triggers now??