The next step of wtf would be to have to be The Area that slows down time, not a gobal, but a general area you can use like a spell, so many people say ohhhhhh its not possable, but it is, I solved it in 2008.
Anyone can make it that knows jass, you simply make sure every unit has a custom projectile, that you set up as a variable, this way you can alter it inside a zone and outside a zone, this will allow units to also have their animations match that of the projectiles speed, and when it hits the person its going to attack, meaning even if you throw it into the zone it will suddenly start to slow down in mid air, just don't spam it.
You can alter and distort the sounds in that zone too and add a special effect.
Will I show you an example? No, because its simple enuf to follow what I just said if your smart enuf.