The Digger Scythe
This horrifying subterranian creature encounters clueless humans in the desert and impales them with it's tail-spear.
It ambushes them and cut's their tendons in their legs to disable them. This creature can move at surreal speeds underground. It's extremely aggressive and has astounding hearing capabilities, using loose sand as it's conductor.
After impaling it's victim, the Digger Scythe will drink his blood and toss the body aside to rot.
They are extremely territorial and have been known to fight eachother to the death on a regular basis.