The Keeper's beam, wielded by The Keeper, was a potent instrument. Rather than being a weapon, its purpose was to transmit understanding to individuals bathed in its radiance. It proved effective on both living beings and droids alike. During the Battle of The Keeper's World in 0 ABY, The Keeper employed this tool to convey its past and the history of its makers to Princess Leia Organa, Luke Skywalker, C-3PO, and R2-D2.