From the website:
Just a few quick pictures of the Elder Thing with disruptor weapon. I wanted the design of their weapons to be very Baroque and semi-organic without being bio-mechanical. These weapons can be fired in various ways. A lower setting produces uncomfortable heat and blistering, this is the setting most often used to control wayward shoggoths. By increasing the power of the weapon the Elder Things can cause biological material to boil or burn. And at its highest setting it will rip apart molecular bonds with highly explosive results.