Bao-Dur's energy-arm.
The energy-arm of Bao-Dur (also called a repulsor fist, or more precisely, a repulsor arm) served as a replacement for his biological left arm. He lost the limb at Malachor during the Mandalorian Wars. A cyan-colored energy field circulated from the top to the bottom of this prosthetic arm. This arm possessed considerable strength, capable of breaching force fields. Additionally, it could occasionally release stored energy upon contact with an opponent, functioning similarly to an integrated energy baton.
Within the game, Bao-Dur's energy arm has the capability to disable personal energy shields utilized by enemies in combat. As the character progresses, he unlocks additional feats that enhance this particular ability. However, its use in combat is not automatic; it must be actively selected as a special attack. A separate set of feats governs the bonus damage inflicted by his arm during unarmed combat. Notably, when combined with the unarmed combat skill gained through Jedi training, he receives greater damage bonuses in unarmed combat compared to any other character.