Auto Cast Spell

Is there anyway to make a unit auto cast a spell like Chain Lightning or something like storm bolt?

if yes, is there a way to make the unit have this ability turned on by default?

As much as i know: no
But you can make a dummy autocast spell and order a dummy unit (position should be the same as the casting unit) to cast the needed Spell.

That should work, i tried to do that but i couldn't figure out how to trigger the casting of the real spell after the casting of the dummy spell.

Try make the autocast ability channel for 2 seconds then for triggering create the dummy and find an random enemy unit to cast Chain Lightning on then remove the unit.

-Av3n

I made an example map, well, it contains JASS, but it's only cause i like JASS more than GUI and i hope you understand it
else i can make an GUI Version too, but not today, it's already 23:40.

Thanks a bunch this info should help a lot.