T-shirt design: Oni Picture

This is a design for a local comp, the design can be full colour so this is still a work in progress.

The topic was myths.

My design is based on the japanese mythological demon Oni.

Any colour suggestions would be awesome, though I only till tomorrow to finish this so I better come up with something soon :S
Traditional Thai style Thor
T-shirt design: Oni
Gozo, Isle of Calypso