Unrevealed, possibly NyxNox

Nox (Greek for night) is one of the seven known Fear Lords, mysterious other-dimensional beings who thrive on the purest forms of fear. While the other Fear Lords require fear for sustenance, Nox uses fear as an aesthetic pleasure, and inspires fear in others via complex schemes. Her true origins are unknown; Nox predates the Olympian gods. Many years ago, Nox posed as the goddess Aphrodite and conceived two son after an encounter with the war god Ares, naming them Phobos and Deimos (Greek for "fear" and "terror"); both sons would later perish in battle with Thor and Hercules. In recent years, she secretly influenced the Microverse scientist Psycho-Man in developing his fear-enhancing device and manipulated the demon Thog in using Nightmare Boxes to cause universal madness. Nox joined the other Fear Lords (except Straw Man) in a plot to drive humanity to the brink of madness. Nox attacked the mystics Doctor Strange, Clea, and Rintrah, but the heroes regrouped and slew her sons. Furious, Nox called upon various magical sources to enfold and slay the heroes in night's shadow, but Strange bathed her in the Eye of Agamotto's mystical light, weakening her. Nox fled to avoid capture. Recently Nox, using the name of Nyx appeared in the presence of the Olympians, with her reluctant champion Nightmare, to battle on the side of Hera, who was seeking to become sole ruler of the Olympians after the death of Zeus.