? is possibly Herne or Cernunnos. Leader of the Wild Hunt.
>In another variation of the legend, Herne was fatally wounded while saving King Richard from a charging stag. He was miraculously cured by a magician who tied the antlers of the dead stag to Herne's head. As payment for bringing him back to life, the magician claimed Herne's skill in forestry. Doomed to live without his beloved hunt, Herne fled to the forest, and hanged himself, again from the oak tree. However, every night he rides once more leading a spectral hunt, chasing the game of Windsor Forest.
thoughtco.com/herne-god-of-the-wild-hunt-2561965