I Need help/ideas/tips on making a skill

I have a spell idea in mind, but I'm not sure how I can make it. So I have some questions.

1) Can I change the units/models being used by the skill "Stampede"?
2) How do I make them come from all directions toward a certain point?

I've seen a spell Tree Trap before.
I make a character use a spell to create the unit "tree trap", then when someone goes near the trigger activates and then the unit "tree trap" gets killed/destroyed and trees appear one by one circling the area where the unit "tree trap" was.

I was thinking of adding something like that, but I want the trees to appear instantly around the unit I casted my spell on. So yeah I need help on doing that too.

1)in the ability editor its artmodel, its near the top any way.
2)requires triggers,
3)triggers

uhhm yeah I pretty much guessed it needed triggers but I want to know how to make the triggers.

Btw does anyone have an idea on what base spell I should use? or does that not matter?

Base spell doesnt matter so long as it isnt reused.

In your number 3 i suggest using a ward, like goblin mine, so that you can easily cast it, then you do minimal triggering

For number 2, stampede will do.

Actually, stampede is a poor choice for number 2. Since the spell will have to be entirely triggered, you should use a dummy channeling spell with no effect as the base. Since the new spell has no specific direction (projectiles come from all directions equaly), the base spell should be a no-target spell, unlike stampede which is point-target.

Try again Anti, you should read all the posts next time.

EDIT: Why do people always do that? Just read the posts, even if you read just the first and most recent ones you should have a general idea about what should be happening... people seem to just post without reading a lot now days, and its annoying(_ _*)

so uhh can anyone specifically tell me how to make them come in from all directions towards a certain point? not just from the caster towards the "certain point? and Can I make Stampede use a lot of models at the same time?

stampede has a density field, i think its number of projectiles or something and yes ppl could give you the code/triggers. don't know if any will though, i cant help you there either any way.

Celestamine, you're going to have to use triggers if you want the units to converge on a point instead of just move in a direction.

And you'll especially need to use triggers if you want different unit-types to appear.

Cast standart spell and also create dummy to cast other directions.

can anyone clue me in on anything on the triggers you dont have to give it to me straight. I just need a guiding light coz I'm totally noob at triggering. :[ I tried making custom modelled "trees" but they appear as shadows and they don't even block the path. I tried making it the same as what I saw before but I'm failing at that. So basically, Now I need help changing the model of trees, but still having the same functions and use. Just the model is different. and I need help making a trigger that makes "trees" that circle around the "triggering unit".

trees have special models with replaceble texture, soo you cant use standart model for units.

i successfully made a custom doodad. now I need to know how to make a trigger that makes destructibles circle around the triggering unit.(with no empty walkable spaces in-between each destructible)

That should be pretty simple,

Just use something like

"For each integer 1 to (number of trees) do:
Unit - create 1 tree for (owner of (casting unit)) at (Position of (target unit of ability being cast) offset by 100 towards((360/(number of trees)x(loop integer A))"

And thats all.