Thanks everyone. And Used, I won't be colouring the Intern, but I might draw another and colour it.
Did someone say 'Slig'?
This was a flippin' pain to do, especialy since I havn't used colouring pencils in years. And I had to layer the colours, which got me confused a couple of times. All in all I'm pleased with how it came out, though I think the neck's a bit fat. This has inspired me to start using pencils again. I might try to do a Vykker, Intern, or an Elum next in the same way.
For those of you who care: Apart from the eyes, the mask was coloured using only one black pencil. I used three different shades of green and two shades of brown for the skin, all layered on top of each other. The background I cleaned up in Photoshop. Luckily my scanner only killed the background this time and not the actual picture.