A Force essence represented the awareness and consciousness of a sentient entity. The Darkstaff, a significant Sith artifact, had a craving to devour Force essences, and furthermore, it possessed the capability to extract these essences from living beings. Around 21 BBY, a Chevin slaver, through an unintentional action, triggered the staff to forcibly remove the Force essences from a number of his enslaved people, subsequently transferring these essences into a crystal pyramid.