Linda L. A mushroom.
https://fungi.com/collections/host-defense/products/chaga-capsules
“Embraced by Eurasians for centuries and found throughout boreal forests, Chaga (Inonotus obliquus) grows primarily on birch trees. Studied and treasured worldwide for its health-enhancing and antioxidant properties,* Chaga is a unique species, and the focus of recent and ongoing scientific research.”
Brian Setzer Orchestra - Angels We Have Heard On High
https://www.youtube.com/watch?v=1slhJWUPjzs