Nyx appears at times as a beneficial Goddess who symbolizes the beauty of the night, at times as the cruel Deity that curses and punishes with night terror (Hecate and Asteria). Nix is also a Goddess of Death, the first queen of the world of Darkness. She also has prophetic gifts, and she was the one who created the weapon that Gaia gave Cronos to dethrone Uranus. Nix knows the secret of the immortality of the gods, being able to take it away and turn a god into a mortal, as he did with Cronos, after he was dethroned by Zeus.
Sometimes, following the example of Hades, whose name was avoided to be pronounced, they give to Nix Greek names of Euphrone and Eulalia, that is to say, Mother of the good advice. There are those who mark their empire north of Ponto Euxino, in the country of the Cimmerians; but the situation generally accepted is in the part of Spain, Hespéria, in the region of the west, near the columns of Hercules, limits of the world known to the ancients.