So i just looked at the Shadowfire Kindred Splash Art and noticed how Lamb was walking on water. That reminded me of Princess Mononoke's Forest God.
Since Lamb & Wolf represent life and death, why not make Lamb's steps leave a trail of plants little plants, disappearing shortly after. And for Wolf: If he attacks an enemy Champion, that Champion leaves dark spots on the ground, representing corrupted or dead plants. Just like the Demon Ashitaka (probably spelled wrong) fought at the beginning of the movie. Another possibility would be to make the marked enemy Champion leave this trail.
Here are 2 pictures i found on the internet, showing what i have in mind:
I hope you like the idea and thanks for reading!