It was a snake, cold of eye, its tongue flickering, its fangs dripping with poison. It hissed, and a drop of poison from its mouth dripped onto Loki’s face, making his eyes burn. Loki screamed and contorted, writhing and twisting in pain. He tried to get out of the way, to move his head from beneath the poison. The bonds that had once been the entrails of his own son held him tightly.
Neil Gaiman, Norse Mythology [Amazon, Bookshop, Publisher, Local Library]