I would like to see a ghost/spirit aura in a smoky type color. I know we've had a ghost aura before but it was a little cartoony looking. I would prefer something a little more scary/realistic. Also I think a pulsating "echo" aura would be cool which would consist of an echo of our toon pulsating outward. Hard to explain I know. Maybe think of the agents in the Matrix when they're dodging bullets. I'll try to find an example.