How to: Missile destroying on it's first target?

[Molehole]

Ok so I'm basically doing a spellblock minigame into my map. There are casters casting spells in line from the other side of the arena. The spells must not hit the back wall. Instead you have to use abilities to create units in the way of the spells. So basically theres a spell coming trough and then you create unit on its way and then the unit is hitten by the ability. Both unit and spell are destroyed.

Question is: How do I remove a spell after it has hitten it's first target. I'm using Shockwave as the base ability but please tell me if some other ability works better. I am GUI user so please no Jass if its possible The problem for example with Firebolt or storm bolt was that it doesn't hit any other target than the target it's casted to...

Thanks!

 

[KaerfNomekop]

You need to use dummy projectiles for this. Make some units with Locust and no collision size so they don't block normal units, then trigger their movement periodically in their facing direction, while checking for enemies around them.

 

[MP®]

Yeah what Kaerf says. If you don't know how to do it, you should search the internet for a 'projectile system', there are many of them.

 

[Molehole]

This was something I did. I made units that check if an unit is in their range so they "damage area". For some reason the spell stopped working when I putted the "locust" on them. The trigger was like:

Peridiocal event: Every 0,1 seconds

Actions
- Pick all units matching condition (matching unit is a "missile")
- Number of units in (units in 100 range) of position of (picked unit) greater than 1 ----This means that theres more than the missile itself=builder or the unit built
- Damage area blah blah

So this worked without locust but when I applied locust it stopped working :/ what now?