Ruriix informed me that the enchantment on his bone cage can be broken with a special powder carried by ogre shamans. I doubt they will give them up without a fight. The shamans can be found within the stone buildings about Oggok.
Slay Oggok spiritbinders for their magical powder (5)
I should return to Ruriix's cage and free him before the ogres take notice of their dead spiritual leaders.
Slay the high shaman guarding Ruriix's cage
Use the bone powder to disenchant Ruriix's cage
Speak to Ruriix
I need to hurry back to Czilk and see if Ruriix returned safely.