Energy spiders or spice spiders are arachnids that inhabit the spice mines of Kessel. They live in complete darkness inside the mine's caves spinning webs made of glitterstim, a rare kind of spice. The spiders shoot webbing from their mouths to capture prey, impale them and then quickly suck the life energy from them. They are one of the many threats faced by the spice miners, especially those who wander too deep into the caves where the spiders live.
Only when fed ryll, will the energy spiders produce glitteryll and grow to large sizes.