ability triggering help

[shan]

in the map Advent of the Zenith...
the Demon Hunter guy has some effect where he makes a mirror image come and attack some1 else, it's like cleaving attack i just wanna know...
if u dont know what i mean just ask...
OK?!
so please tell me

 

[Hemlock]

- Make a clone unit with a duration cooldown.
- Make an dummy ability.
- Make trigger to attach the dummy unit to.
- Create a clone unit inside the trigger.

Not that hard to be honoust.

 

[shan]

im a N00B, so its harder for me
lol
so can you make it a bit more easier for me!!!
even though it'll be harder to make it easier just explain the steps a better please...