Art by Dan "SMiF" Smith (dan smith @ io . com), coloring by Elizabeth "Me" McCoy.
This appeared first in the GM Pack adventure, Feast of Blades. Then, with some modifications, in the Infernal Player's Guide. Then I tweaked it to be a little closer to the description... This is a BIG picture! 840K, and takes 2 minutes and 19 seconds to download on a 28.8 connection.