Basilisk , know as King of all Serpents. The venom of a basilisk can rot fruit and pollute water. One look into a basilisks eyes and you're dead. A power shared with Medusa.
The most recent face of the basilisk appears in Harry Potter and the Chamber of Secrets. (The skeleton of the basilisk is shown in Harry Potter and the Deathly Hallows pt 2).Other forms of the Basilisk has a human face, a cockerel's head and Dragon wings.