Basilisk

A Basilisk (from the Greek basileus, a king) is a mythical reptile, reputed to be king of serpents, which is supposed to have the power of causing death by look alone. According to the Naturalis Historia of Pliny the Elder, the basilisk is a small snake that is so poisonous that it leaves a wide trail of deadly venom in its wake, and its gaze is likewise venomous.

It is called a king from having on its head a mitre-shaped crest. In the same blood line as the cockatrice. The Basilisk is fabulously alleged to be hatched by a serpent or reptile from a cock's egg.

see also Greek mythology