Travel through the Demonic Gateway to reach the summoning platform and use the Bloodstone to subdue the eredar sisters once the summoning is complete.
It would be best to conduct the summoning on the outskirts of Dreadscar Rift. If things do not go as planned, at least the aftermath will be contained to a small island of land that floats above our order.
Once the sisters have been summoned, use the Bloodstone to enslave them.
I'll let the others know it's time to begin.
You will also receive: