Another Holy War
A Void Crystal is a purple, gem-like stone that emits a bright, blinding light. These crystals seem to have the ability to communicate via some sort of telepathic link that activates each time they light up.
Destroying a Void Crystal releases the energies of the void trapped within the crystal, ripping and tearing the very fabric of time and space in the process. The resulting damage creates a purple-swirling vortex that draws everything towards it.