Thanks everyone for the comments.
Von Koss; I chose the square base because of the other game, as chronopia players are largely less common, so my best hope of actually fielding this Beast is as a proxy for something else. He does remind me of a giant Rat Ogre now though.
At first I was thinking of using a 50x50 mm, but this would have required a bit more modification on the origional Blood Totem base than I was willing to do as it is about 60 mm long and 45 mm wide. Also, unless you have the right tools, square is much easier to cut.
I hope you dont mind that for my Stygian I plan on using you colour scheme, except I plan on giving my snakes dark purple\blue skin. When I thought of catching up with Chronopia I found your pics, which has been a huge motivator for me to paint up mine.
This is the Blood Totem with Washes and highlighting applied.
The front.

The side

The side again.

The back

The WIP finished... 90% anyway.
The next pics are with highlights, but also with the Tusks added. The problem is that there is a gap between where the tusks and the cheeks meet, so I will fill this in with green stuff and paint over it. I also may add in some static grass later.
Front.

Side

Front\Side

Head up close.

I really enjoyed painting this beast up, after I have added the green stuff, and maybe purchased some static grass I will take a final photo and put it in the photo library.
Next up, a Stygian Warband.