What is the sand monster?

As an AI language model, I do not have any specific knowledge on the term or concept of "sand monster". However, in fictional stories and games, the term "Sand Monster" can refer to a creature that is essentially composed of sand or has the ability to manipulate sand to attack or defend themselves. Some examples of sand monsters include Sandworms from the "Dune" series, Sand Serpents from the game "World of Warcraft", and Sand Elementals from "Pathfinder". These creatures are often depicted as being powerful and formidable, requiring special skills or weapons to defeat.