Medusa in the context of "Decapitation"

The Gorgons (/ˈɡɔːrɡənz/ GOR-gənz; Ancient Greek: Γοργώνες), in Greek mythology, are three monstrous sisters, Stheno, Euryale, and Medusa, said to be the daughters of Phorcys and Ceto. They lived near their sisters, the Graeae, and were able to turn anyone who looked at them to stone. Euryale and Stheno were immortal, but Medusa was not and was slain by the hero Perseus.

Gorgons were dread monsters with terrifying eyes. A Gorgon head was displayed on Athena's aegis, giving it the power both to protect her from any weapon, and instill great fear in any enemy. Gorgon blood was said to have both the power to heal and harm.

In Greek mythology, Stheno (/ˈsθiːnoʊ, ˈsθɛnoʊ/; Ancient Greek: Σθενώ, romanized: Sthenṓ, lit. 'forceful') and Euryale (/jʊəˈraɪəli/ yuu-RY-ə-lee; Ancient Greek: Εὐρυάλη, romanized: Euryálē, lit. 'far-roaming') were two of the three sister Gorgons, the third being Medusa, who were able to turn anyone who looked at them to stone. When Perseus beheaded Medusa, the two Gorgons pursued him but were unable to catch him.

In Greek mythology, Perseus (US: /ˈpɜːr.si.əs/ , UK: /ˈpɜː.sjuːs/; Greek: Περσεύς, translit. Perseús) is the legendary founder of the Perseid dynasty. He was, alongside Cadmus and Bellerophon, the greatest Greek hero and slayer of monsters before the days of Heracles. He beheaded the Gorgon Medusa for Polydectes and saved Andromeda from the sea monster Cetus. He was a demigod, being the son of Zeus and the mortal Danaë, as well as the half-brother and great-grandfather of Heracles (as they were both children of Zeus, and Heracles's mother was Perseus's granddaughter).

A monster is a type of imaginary or fictional creature found in literature, folklore, mythology, horror, fantasy, fiction and religion. They are very often depicted as dangerous and aggressive, with a strange or grotesque appearance that causes terror and fear, often in humans. Monsters usually resemble bizarre, deformed, otherworldly and/or mutated animals or entirely unique creatures of varying sizes, but may also take a human form, such as mutants, ghosts, spirits, vampires or zombies, among other things. They may or may not have supernatural powers, but are usually capable of killing or causing some form of destruction, threatening the social or moral order of the human world in the process.

Animal monsters are outside the moral order, but sometimes have their origin in some human violation of the moral law (e.g. in the Greek myth, Minos does not sacrifice to Poseidon the white bull which the god sent him, so as punishment Poseidon makes Minos' wife, Pasiphaë, fall in love with the bull. She copulates with the beast, and gives birth to the man with a bull's head, the Minotaur). Human monsters are those who by birth were never fully human (Medusa and her Gorgon sisters) or who through some supernatural or unnatural act lost their humanity (werewolves, Frankenstein's monster), and so who can no longer, or who never could, follow the moral law of human society.

Humbaba (Ḫumbaba; 𒄷𒌝𒁀𒁀, Ḫumbāba, with an optional determinative 𒀭), originally known as Ḫuwawa in Sumerian (𒄷𒉿𒉿, Ḫuwāwa), was a figure in Mesopotamian mythology. The origin and meaning of his name are unknown. He was portrayed as an anthropomorphic figure comparable to an ogre or giant. He is best known from Sumerian and Akkadian narratives focused on the hero Gilgamesh, including short compositions belonging to the curriculum of scribal schools, various versions of the Epic of Gilgamesh, and several Hurrian and Hittite adaptations. He is invariably portrayed as the inhabitant or guardian of the cedar forest, to which Gilgamesh ventures with his companion Enkidu. The subsequent encounter leads to the death of Humbaba, which provokes the anger of the gods. Humbaba is also attested in other works of Mesopotamian literature. Multiple depictions of him have also been identified, including combat scenes and apotropaic clay heads.

It has been suggested that the iconography of Humbaba influenced depictions of the gorgons in Greece, in particular scenes of Perseus slaying Medusa with the help of Athena. A late derivative of Humbaba also seems to be found in both Jewish and Manichaean versions of the Book of Giants, where one of the eponymous beings is referred to as Ḥôbabiš, Ḥôbabis or Ḥōbāīš. While it is agreed the name is derived from his own, the context in which it appears shows no similarity to known myths involving him. Traces of Ḥôbabiš have also been identified in a number of later works belonging to Islamic tradition, such as religious polemics. A number of connections have also been proposed between Humbaba and figures such as Kombabos from the works of Lucian or biblical Hobab, but they are not regarded as plausible.

In classical mythology, the Cap of Invisibility (Ἅϊδος κυνέη (H)aïdos kyneē in Greek, lit. dog-skin of Hades) is a helmet or cap that can turn the wearer invisible, also known as the Cap of Hades or Helm of Hades. Wearers of the cap in Greek myths include Athena, the goddess of wisdom, the messenger god Hermes, and the hero Perseus. Those wearing the Cap become invisible to other supernatural entities, akin to a cloud of mist sometimes used to remain undetectable.