The Annihilation Droid XRR-3, named Silentior by its creator Soa, was originally used to destroy civilizations during the period of the Infinite Empire but was re-programmed to protect the Eternity Vault prison on Belsavis during the Cold War from anything getting in or out. İt used a sweeping attack to fling nearby enemies away. It could also fire a deadly missile swarm which was very dangerous for enemy soldiers. Additionally, it utilized Storm-protocols which enabled it to assimilate enemy tactics and effectively defend itself against them.