The lord of change works with mysterious ways, but I have to agree that a living person in the cage would bring it just closer to perfection. I can't wait to see you do dioramas of Nurgle and Slannesh. Of course any dioramas doing jusatice to THEM will probably be too much to get past the censors. :)
Damn nice man! The staff & the skin of the Demon looks awesome, and the wood looks almost real. But I have to admit like the other posters that the skeleton just isn't in theme with Tzeentch... otherwise excellent work!