Black hole effect?

[KnnO]

How do I achieve this effect on the terrain:

Is it an imported model or what?
please tell me how to get such thing.

I tried a basic glow model on ground but it gets over kel'thuzad's ghost and not able to see him because his model material is alpha additive.

If it is an imported model can you make it?
thanks

*this is a spell from dota map..

 

[JesusHipster]

It's just a huge ubersplat i guess. It's not a model, it's a texture.

 

[Chuchulain]

use unit shadow flying

 

[KnnO]

It's just a huge ubersplat i guess. It's not a model, it's a texture.

Wow I never really thought it could be ubersplat because I don't use it. so it is just a big splat?

I will try it in a map
Edit:
How to make an uberspalt with custom texture? or what are the paths of ubersplat types textures: {Dark conversion, goldmine... etc}?
Furthermore I want the same splat in the screenshot but yellow colored one.

 

[ForeverBeADragon]

They are a lot of units shadow. When I turn off the Unit Shadow in Option/Video Menu, that effect doesn't appear. Same to Spectral Dagger's effect in that map.

 

[KnnO]

That's why sometimes spectral dagger lags the game.
So it is a sum of shadows of many units.

Anyway I'll go with ubersplat because I want to use a custom texture and that seems the only way