Wer (Wēr), also known as Mer, Ber and Iluwer was a weather god worshiped in parts of Mesopotamia and ancient Syria. It is presumed that he was originally one of the main deities of the northern parts of these areas, but his cult declined in the second half of the second millennium BCE. The nature of the relation between him and Itūr-Mēr, the tutelary god of Mari, is disputed by researchers. In an Old Babylonian version of the Epic of Gilgamesh, Wer is described as the master of the monster Humbaba, though in other versions of this narrative this role instead belongs to Enlil.