This is what their makers, UK engineers of the aerospace firm AgustaWestland call Project Zero. It is a mostly carbon-fiber ultra light and maneuverable tilt rotor aircraft.
Seen from below at night it would look mostly as a silent flying triangle.
Phantom in the air
“Phantom” is a quadropter or quadcopter, a radio-controlled small device that could be used for various purposes like monitor traffic, a fire, or just for recreation.