Gerune

The Gerune, also known as a "Sandman", is a sandy blob that only appears in the Sand Temple of Spirit Tracks, in groups of two or more. The Gerune has two eyes and a drooping mouth.

Characteristics and Weaknesses
The Gerune is quite the impregnable enemy as it is immune to all weapons with the exception of the Sand Wand. Only after stimulating it with the Sand Wand will it stiffen, similar to the way regular sand rises to form solid blocks when the Sand Wand is used. Gerune will get scared of the Sand Wand's powers, and will begin to dash around the area at high speeds. In its hardened form, Link can either destroy it with his sword, or hoist the foe above his head and throw it, and upon hitting the ground it will begin to flake, changing to increasingly darker colors as it receives more damage. Only after three throws in its solid form will the Gerune submit to defeat, often dropping nothing for Link's efforts save on rare occasions, yielding only one Recovery Heart.

Like Armos and other solid stones and blocks, a hardened Gerune can be used to activate switches in Link's stead, and must be used as such in one puzzle within the Sand Temple itself.