Xylaria longipes, aka dead moll's fingers. Shot couple of winters ago in north of Brandenburg at the Barnim natural park. A 2008 study concluded that the species could improve wood for the purposes of making violins.

https://nph.onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2008.02524.x

#fungi #Xylarialongipes #macro #muschroom