Had an idea for cool monster

Sand Grinders. Theyre big, sand yellow lizards. The females are about the size of rhinos. Normally, female Sand Grinders are rather slow, with big unwieldily but powerful limbs and a large, mildly less unwieldily tail. But female Sand Grinders have imbricate scales on their tummies, and sand that gets caught in their scales are then vibrated by said scales, allowing the female to create immense amounts of electricity given the rapidity of movement and quality and fineness of the sand. This electricity can be stored in its tail in a hyper conductive salt water like fluid. Using an incredibly intricate system of muscles, female Sand Grinders can manipulate the lipids in their body to insulate themselves as they spark their tails, creating an effective sword of lightning on their tales. Alternatively, they can use the electricity they create to force extremely powerful and quick movements in their limbs, which they like to use to create strong bursts of movement they can use to slide across the sand, therein generating more electricity.

Female Sand Grinders are typically accompanied by their harem of mates, Male Sand Grinders which are about the size of really big dogs. Typically a harem of Sand Grinders is 3-6 males and one female. The males don't have the same muscular system, but they do have sacks of the same fluid from the Female's tail that rests somewhere on the neck. They can spit electric balls of the fluid, but they also have large spines on their backs to discharge large quantities at once. The female has smaller versions of these spines that cannot discharge, but CAN receive, effectively making the males batteries for the female. Females who have no charge and no potential boost from their mates rub their funny bellies on the ground in a manner thats extremely cute to quick charge.

The fat of the female's tail can also be processed into a neural dampener, popularly mixed with drinks to create a lean equivalent called Sulate.

When you have a break up, ya gotta switch things up