WIP I
It could use shading.
And where is the bottom jaw; if you not including it, make some blood running down his chin, or make it to where you can see his tongue.
For now, 7/10.
Keep up the heads.
Looks ok.
Make broken teeth and a lot of blood!
And maybe a skinless part to show the brain.
I like how it's free handed and not mirrored like most of the heads I see now days.
Being a wip I assume you are going to add lower teeth?
If not as leo and grad said add blood and flesh and what not.