Asag

Asag or Azag, resided in Kur as one of the Gallas (Gallu), adversaries of humans who were known for torture.

In one myth, Asag is said to be accompanied into battle by an army of rock demon offspring—born of his union with the mountains themselves.

Lugal-e, a poem
In the Lugal-e Sumerian poem, Asag is a monstrous demon so hideous that his presence alone makes fish boil alive in the rivers.

Akkadian
Borrowed into Akkadian, Asag was vanquished by the Ninurta, who used Sharur the enchanted talking mace after seeking the counsel of his father, Lord Enlil.