Cryptid said to live in the Gobi desert. Spits acid, kills by electric shock, looks like a sausage. Featured in expedition diaries from the 1920s onward.
From Wikipedia
The Mongolian death worm is a creature alleged to exist in the Gobi Desert. Investigations into the legendary creature have been pursued by amateur cryptozoologists and credentialed academics alike, but little evidence has been found to support its existence. It can be considered a cryptid or a mythological animal.