Mongolian Death Worm

Scourge of the Gobi Desert, the infamous Death Worm of Mongolia was used to scare children, however, sightings have always been reported.
About this Cryptid

The Mongolian death worm (Mongolian: олгой-хорхой, olgoi-khorkhoi, "large intestine worm") is a creature alleged to exist in the Gobi Desert. The creature first came to Western attention as a result of Roy Chapman Andrews's 1926 book On the Trail of Ancient Man. The American paleontologist was not convinced by the tales of the monster that he heard at a gathering of Mongolian officials: "None of those present ever had seen the creature, but they all firmly believed in its existence and described it minutely."