A Satyr.
They are centaurs.
A satyr is a creature from Greek mythology with the upper body of a man and the lower body of a goat, known for its mischievous and lustful nature. A centaur, on the other hand, is a creature with the upper body of a man and the body of a horse. Centaurs were often portrayed as wild and untamed beings in Greek mythology.
Half man, half horse specifically the torso, head and arms of a man, attached where the neck of a horse would have been, and the four legs, body and tail of a horse.
The closest thing is a Satyr... it has horns on it's head but it's legs are goat legs.
octupus is of greek origin.. it actually means that this creature has eight legs
The ancient Egyptian Sphinx has the head of a man and the body of a lion. Also, in Egyptian mythology, there is a creature called the Anubite that is half of a man and half of a jackal.
A centaur is a mythological creature with the body, arms, and head of a man, but the front legs, back legs, and body of a horse.
the greek god Pan
Im not sure about that but it may be greek mythology there is a creature called a hydra it has many heads but everyone you cut off two will grow and usully the one(s) in the middle spew fire
THE HIPPALEKTRYON was a beast with the foreparts of a horse and the tail, wings and hind-legs of a rooster. The creature occurs only in early Athenian vase painting, and may be based on an early artistic rendering of the winged horse pegasis
The Sphinx was the gaurdian of Thebes in Greek mythology. In answer to your question, no one really 'killed' her, except indirectly. She basically comitted suicide because Oedipus solved her ridlle. "Which creature in the morning goes on four legs, at mid-day on two, and in the evening upon three, and the more legs it has, the weaker it be?" She strangled and devoured anyone unable to answer. Oedipus solved the riddle by answering: Man-who crawls on all fours as a baby, then walks on two feet as an adult, and then walks with a cane in old age. By some accounts[5] (but much more rarely), there was a second riddle: "There are two sisters: one gives birth to the other and she, in turn, gives birth to the first." The answer is "day and night" (both words are feminine in Greek).
There is nothing "conventional" about this creature, even for mythological beasts. It does not show up on any search of mythology or cryptid data bases. If you invented it, it is up to you to name it.