Dark side items

Used her as a more general term than dark side relics.
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Little was known about Katak Crystals or their origins. They were generally only found in the lightsabers of dark side Force users. Users of this lightsaber crystal managed to drain some of the life force of those within close vicinity. This would not be enough to instantly fatigue the victim, however; prolonged exposure would prove to be fatal.starwars.fandom.com