I've finished my entry here. I wanted to practice drawing backgrounds with depth, so I drew Zeus enjoying a sunset with his head proudly held high after traversing a difficult landscape.
With his horn, the angular shape of it made me think of quartz or some other type of cut crystal, so I colored and shaded it in a way that gives it a hint of transparency. I think the way it looks suits him well, so I chose to leave it in for this submission. If you prefer it without the translucent horn, I can post the version where his horn is fully opaque looking.
I'm really glad you extended the deadline! Stuff came up in life that kept me from working on my wip of this all weekend.
Anyway, I hope you like it, here he is! (the full image is 1920x1080, but I'm not sure if it can show up the full size here. So let me know if I need to post the link as well!)