Jack was still in the underground chamber fighting the Raretooth tribe. He summoned Therras, his spirit weapon, and his ten golden wolves.
He easily killed the lower-ranked orcs of the tribe. When he saw a higher rank, he incapacitated them and then bound them using runic ropes. He didn't have that many runic ropes to capture every orc here so he chose those with higher ranks. These orcs might have valuable information, so he tried to capture as many of them as possible. Otherwise, he would have just obliterated them with Perpetual Lightning Judgement or Lightning God Barrage.
Jack remained near the secret exit to stop anyone from using the exit, while Therras went to the stairs to stop the orcs from running up to the village hall. His golden wolves and spirit weapon dove into the enemies' midst and caused disturbance so they couldn't adopt proper formation.