It's a spinning charged singularity under the control of powerfull magnetic fields. I recommend an attack of like 1000. If the controlling magnetic fields are disrupted, the singularity is designed with a second "safety" field of antigravity, causing it to eject itself away from all material objects rather than sink to the center of the earth and suck up all the molten metal until it floats in the center of a huge and fragile cavern of flash frozen mantle.