First, here was Mr. Moeller's original sketch:
Nekrataal sketch by Christopher Moeller
And here is the piece in full color:
Nekrataal art by Christopher Moeller
Planar Chaos previews continue for the next two weeks, leading up to the big prerelease January 20-21. Tenth Edition hits shelves Summer 2007. Stay tuned to magicthegathering.com for more information on Planar Chaos and Tenth Edition!