Lowbacca spotted one of the Ithorian Jedi Knights and his Bothan apprentice battling against several other Jedi, including Tekli and Alema. The pair had already taken out several Jedi, including Wookies and Mon Calamarians. Just as another Rodian fell, Tesar jumped into the battle and stunned the two Jedi with his blaster. The two slumped to the ground like a sack of potatoes.
Lowbacca inspected the damage. There were nearly thirty Jedi lying on the ground, dead. Several others were injured. He had the unharmed Jedi take those that had been wounded to the medical wing, where Tekli had already started advancing, with some of her medical apprentices. As Lowbacca bent down to look at the Ithorian and Bothan, he was shocked. Both now looked dead. He checked for a pulse, and could not find one. However, at that moment a Drall came up and asked to speak to Lowbacca in private. Lowbacca took the Drall, Grebfilg, into his private quarters. There, the Drall explained everything that had happened.
Grebfilg had been one of the Jedi Knights whose apprentice had fallen. He told Lowbacca a story that was unbelievable. The Ithorian, Kesal, and his apprentice Ak'Sum, had been training with Grebfilg and his apprentice Koski, the young Rodian Lowbacca had seen fall. The four had gone into the forest late one night to ward off some of the predators that had been prowling around the academy.
That night, the four were visited by the spirit of Brakiss, a Dark Jedi that had been killed on Yavin 4 during the attempted takeover of the Jedi Academy by the Second Imperium. Brakiss had once attempted to infiltrate the Jedi Academy in order to learn the ways the New Republic was training the new Jedi. Now, it seemed his spirit had been transferred to Kashyykk. Brakiss's spirit had tried to convince Grebfilg, Kesal, Koski, and Ak'Sum to turn to the Dark Side. Grebfilg had refused, and he had assumed that Kesal had had the same idea. Apparently, Kesal and Ak'Sum had not.
Lowbacca was scared at the possibility that a Dark Jedi could be roaming the forest of Kashyykk. The first thing he did was send a message to Caballero, who he had put in charge of the younger Jedi. He told Caballero to get them all off planet, and chart a course for Eclipse, where Master Skywalker would be waiting for them. Next, he informed Master Skywalker that a group of young Jedi would be coming towards Eclipse. He also asked for reinforcements, informing Master Skywalker that a Dark Jedi had come to Kashyykk, and had started bringing Jedi under his sway.
After Master Skywalker promised to send Jacen, Jaina, Tenel Ka, Zekk, Tahiri, and Danni Quee, Lowbacca headed outside to talk to his remaining Jedi. However, what he saw was that only ten Jedi remained. Grebfilg told Lowbacca that the spirit of Brakiss had appeared, and had convinced nearly all of the Jedi to follow him. The sixty Jedi had followed, led by the Bith Yont Kwah and his Chironian apprentice, Regper. Lowbacca shook his head, and called forth Tesar, Alema, and Tekli, along with Grebfilg and the Quarren Notsok to plan out their battle strategy.