Out of pure bordesome I tried some UVmapping tricks combined with effects and this is what I got. No custom textures as always. The theme is obvious by the name. One aura goes perfectly well with the priestess of the moon (see screenshot) or other wild units, while the other can go with any nature commanders. Enjoy!
Proteic Aura now included. This aura was more like an experiment with mapping animations.
I think the first aura should have a green variation, would make a good "lucky shot" aura or something. Because it sort of resembles a four-leaf clover.