Holo-drone
From Halopedia, the Halo wiki
Holo-drones are small, spherical objects capable of hovering and flying, that create holographic fields. Holo-drones are used Covenant in serveral varying ways. They can be used as communication devices or even as holographic decoys of individuals who use them[1].
Sesa 'Refumee, the Elite leader of the Heretics, used Holo-Drones as decoys of himself when the Arbiter attacked the Heretics' Base[2].
They are very weak in battle, and a direct shot will destabilize them, and cause them to shimmer (Giving away their Hologram origins). They look like Plasma Grenades only bigger and they can hover.
References
- ^ Halo 2, level The Arbiter
- ^ Halo 2, level The Oracle