WIP Grey Wizard

Finally found time amidst my busy schedule to paint up my Empire army.

This time I rewarded myself after finishing my 30 men Spearmen unit by spending precious painting time on a character.

Here I present to you my WIP Grey wizard casting a shadowy spell from his Pokeball!

~What's left of him is his Staff and the shadowy skull. I don't think I am able to pull of the puff of smoke effect properly on the skull. Anyone with advice on how to go about doing this?

Any help is appreciated!