Originally he was the Daemonic Herald of Nurgle from Forgeworld.
Now, with a little putty work and a paintjob, he's a Mechanicum Magos.
Not much to say that hasn't already been said about the work on my others Magos/Adepts, except to say thanks to Eye Of Error for his quickfire tutorial on painting liquid in vials, found here.
As a reminder, here he is in his pre-paint stage.
And here's a shot to entice you over to our Guns Of April blog. This year's project is just a month away from hitting the table at Adepticon. Hopefully everyone will be ready!