The Composer

The Composer fires an orange beam to harvest the "essence" of an organism, and convert it into a Promethean AI matrix. It is not exactly known how this works, but in a personal log, Catherine Halsey describes this device as similar to the UNSC AI Matrix compiler that she developed. When used on an organism, it painfully burns away the body layer by layer until that organism's "essence" is collected, leaving a pile of ash with a blue particle effect. All Forerunner Ordnance weapons have a similar disintegration effect as the Composer.