The Zoureg is a snake, one foot in length, that lives in the Arabian desert. When it moves it goes through everything in its path like a hot knife through butter; rocks, trees, walls and human bodies are all equally powerless to stop it. Anyone who a zoureg goes through dies instantly. It can only be killed by decapitating it in its sleep.
It has proven difficult to locate de Plancy’s sources for this purported Arabian legend, considering that “zoureg” is an oddly transliterated word with multiple possible spellings in Arabic.
References
de Plancy, J. C. (1863) Dictionnaire Infernal. Henri Plon, Paris.