Orb of the Rebel

I am the owner of the ring. 16 years ago, the Lothranis counselor sensed the coming riot, so he assigned me to investigate in Seat of Torment. I disguised myself as a convict who committed mutiny, and earned the trust of the convicts there. The only thing was my son...He became an orphan. And now, Hellfire Abomination has finally finished his long preparation, and started his evil plan. His ritual is being activated. So far as I know, Orbs of the Rebel are the power used to drive the ritual. If you can get 15 Orbs of the Rebel, I think I should be able to use their power to stop the ritual.