Amphisbaena
From Record Of Fantasy Adventure Venture
The most poisonous snake in the world. It has two heads, but should not be confused with the Stopan, a.k.a. the Two-headed hypno snake. Its skin is on Ikulu's List. A giant snake with two heads. It rolls like a hoop (? what, while kissing?), and spits poison. If it bites you it will dehydrate you, yea unto dust.
Indigenous to the deserts of Libya, in which they was born from the blood of Medusa as Perseus carried her head across the desert. They were reportedly all killed by Kabar Hadra hundreds of years ago as a boon to Libya.