Sith sarcophagus

A Sith sarcophagus was a coffin that contained the physical remains of a deceased Sith sorcerer. These sarcophagi were often found at the center of Sith burial chambers, and resonated with potent dark side energies. The sarcophagus served as a source of power for the deceased's spirit, and disturbing the crypt would often result in the spirit manifesting itself. Prolonged exposure to the potent energies emanating from the sarcophagus caused individuals to embrace their angers, fears, and aggressions, and eventually that being would only be able to call upon the dark side if they tried to manipulate the Force.

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