Ušumgallu or Ushumgallu[2] (Sumerian: 𒁔 𒃲ušum.gal, "Great Dragon")[5] was one of the three horned snakes in Akkadian mythology, along with the Bašmu and Mušmaḫḫū.
Usually described as a lion-dragon demon,[1] it has been somewhat speculatively identified with the four-legged, winged dragon of the late 3rd millennium BCE.
Tiamat is said to have "clothed the raging lion-dragon with fearsomeness" in the Epic of Creation, Enuma Elish.
[6] The late neo-Assyrian text "Myth of the Seven Sages" recalls: "The fourth (of the seven apkallu's, "sages", is) Lu-Nanna, (only) two-thirds Apkallu, who drove the ušumgallu-dragon from É-ninkarnunna, the temple of Ištar of Šulgi.
[8] Its name became a royal and divine epithet, for example: ušumgal kališ parakkī, "unrivaled ruler of all the sanctuaries".