Kindler

A Kindler is a small, floating, spherical device used by the Covenant when exploring unknown territory. The Kindler emits two oscillating beams of purple light that scan its surroundings as it moves, creating a holographic map for its handlers. In 2551, during the Battle of Meridian, a Covenant Special Operations team used a Kindler to search for Forerunner artifacts hidden beneath the surface of the world. Ultimately, it discovered a Luminary inside a large Forerunner chamber.

Trivia
The Kindler is very similar in design and function to the mapping drones used to scan LV-223's tunnels in the 2012 film Prometheus.

List of appearances

 * Halo 2 Anniversary
 * Terminals