In the time frame of approximately 19 BBY, which was soon after the end of the Clone Wars, Len Markus, a Sith apprentice, journeyed to the Heart Tree located on the planet of Cularin. His purpose was to locate the Eye of the Sun, an old Jedi artifact. Nevertheless, a band of freelance agents aiming to obliterate the Darkstaff, a sentient Sith artifact controlling Markus' behavior, encountered him and his mercenaries. Markus employed the staff to conjure 12 Kilassin, a large lizard species, to fight for him, and afterwards he battled the agents. The act of summoning these creatures disrupted the balance of the Force and, as a consequence, the Heart Tree summoned a giant Kilassin to assist the agents. Ultimately, the Heroes of Cularin overcame Markus' forces, and one of the agents willingly gave themselves to the Darkstaff and directed the light side of the Force into it, resulting in the artifact's destruction.