Wikipedia
Ušumgallu
Ušumgallu or Ushumgallu ( Sumerian: ušum.gal, "Great Dragon") was one of the three horned snakes in Akkadian mythology, along with the Bashmu and Mushmahhu. Usually described as a lion- dragon demon, it has been somewhat speculatively identified with the four-legged, winged dragon of the late 3rd millennium .