Making a shooting spell with channel

I was wondering... What would be the easiest way to make a spell based of channel to attack a certain distance away (e.g 500, 1200 etc...), but it was still dodgeble, and couldn't pass through certain objects. Would it be making a projectile unit and changing it's speed with triggers, ordering it to move to the point assigned by the spell? And how could I make it damage who ever is in the area? Thanks for your help.

I did somthing similar to this for my Halo Mod. What I found was easiest was using Carrion Swarm, set the Max distance to whatever range you want, set the projectile to whatever you want, but make sure to set the max damage and the damage to the save value. Then just make objects that you want to block the spell be Hostile units with 50000 health.

However this isnt really channeling, its just a way of making the obstacle system. A dummy could cast this, and the channeling spell just be the effect.

Seems to work... Thank you for da help.

But, out of curiousity, how could I make it that if something was hit, the projectile would go away?

you MIGHT (just might) be able to give the ability no projectial then set it up with the triggers to create the desired special effect traveling right along next to the spell then (still useing the triggers) set it up so that when the projectial hits an enemy unit destroy the special effect.

Correct. You can create and move a special effect. Refer to Lord Vexorian's Spell Map III.