Around 19 BBY, on the planet Cularin, a coven of Tarasin witches known as the Wyrd tried to corrupt the ch'hala Heart Tree with the dark side of the Force. Their goal was to dominate Cularin's ecosystem. Nevertheless, Jedi Master Lanius Qel-Bertuk, along with a band of freelance agents, opposed the Wyrd's scheme. In a final act, Qel-Bertuk gave his life to protect the tree, his spirit becoming one with the ch'hala, and the agents vanquished the witches.