"In the Sumerian poem Lugale, the Asag is a monstrous demon who is defeated by the god Ninurta/Ningirsu (in another version by Adad (Iskur)). The Asag was hideously repulsive in appearance and his power caused fish to boil alive in the rivers. He was born from the mating of An and Ki, and the Asag himself mated with the kur (mountains) to produce offspring. He was accompanied by an army of stone allies (the stones of the mountains). On one level the defeat of Ninurta in this myth of the Asag and the stones expresses the unease felt by the inhabitants of the Mesopotamian plain about the inhabitants of the Zagros mountains." 
It seems clear that the deity as not pleasant to encounter.
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