In my local Games Workshop I took a look at some of the scrolls of binding and not a snaky thing in sight. However, I love converting stuff mentioned in the army book, like the guardian in the map of one of the cities and the Thunder Lizard (nearly finished, will show it soon). However one that captured my attention was the Coatl- a beast with the body and head of a snake but the feathered wings of an eagle. Blessed of Tepok, I loved the description given and set out to make my own. Sadly, I succumbed to temptation when saw a small one on Ebay for £6.00. However, stick some wings on your monster and it will look just like what I had in mind. (you can get wings in the Warhammer Bitz section of the website.)