Greater idol of Set
From ThresholdRPG Wiki
This carved idol is of open-work formed primarily of shining black obsidian. A majestic giant cobra with glittering, faceted emerald eyes is depicted spreading its hood in a threatening display. Strangle vines weave over and around the snake making this piece an 18-inch long lattice of obsidian decorated with gold and silver inlay for detail. The bas relief has several hooks on the back making it suitable for hanging. Each of the deep cuts in the engraving are filled with gold and silver to catch the light beautifully.