Triggers

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Well this spell is made rather easy as I only was concerned with the thought about making this mui.
And well yeah, this is it.

To make it work, do:
*Copy the buff 'RB_buff'
*Copy the abilities 'Rockbreaker' and 'RB_abil'
*Copy the dummy 'RB_dummy'
*Copy all triggers prefixed with 'RB' and if needed all variables prefixed with 'RB_' except for 'do_not_copy_me'

It's easy:
After the shockwave is cast, I hide the caster, move it 850 range away towards the targeted angle and make it re-appear there together with an effect.

We'll start off with 'RBinit', shall we?

So this variable just counts up all playing players (also NPCs) which is needed for the later loop.

Either just copy this trigger as a whole or just export the action into your map

Now, head on to 'RBspelltrig1'

Still simple - first, an effect is created (for the eyecandy) to make it look like the hero unleashes energy.
Then, I have it look to the target point of ability being cast to ensure that he keeps the direction during the travel.
Next, a dummy is created casting 'faefie fire' (RB_abil) on the hero.
We need the buff for the main part of the spell..

Speaking of, we'll now encounter the core - please head over to 'RBspelltrig2'

So, this might eventually look a bit difficult at first, but it's also still simple:

In the first trigger, I have hidden the caster.
Now.that hidden units can't be picked using a 'Pick every unit in *region*'-action, I'll just go through every player.
Here it comes to use the variable from 'RBinit' to get the loop to run equal to the players playing.

Next, I pick every unit of every player that holds the buff caused by 'faerie fire' and set their location and the next point to move to to variables.
If the condition is met (Unit is hidden), the actions are applied - else, the unit is hidden and it's collision disabled

As we also want the unit to stop, in the second Pick-every-unit-action, I check for those which don't have the faerie fire buff but are still hidden.
Now I unhide it as well as pick every unit in 200aoe.
Last but not least, some explosion-ish styled effect is applied for more eyecandy, the unit selected again and it's collision enabled again

--
Yup, that's it
2oo9 by Squiggy