A black plane or sphere

[Elprede]

I am in need of a black (as dark as the Abyss) plane or sphere for a spell that I am working on.

Specifics:
1) Model will cover terrain and doodads.
2) Units and special effects can overlay it.
3) Birth Animation: Starts as nothing from a center point and then grows outward.

3) is not necessary.

Thanks to anyone who can help me obtain such a model.