Speak with Gorzeeki Wildeyes near the Altar of Storms.
My father is waiting for us to the east. Before we head out though, we need to gather some more supplies. This time, you'll be taking it from a warlock by the name of Gorzeeki Wildeyes.
You'll probably find him to the northwest, near the Altar of Storms. Tell him he's going to help us out. We need the sand, the cider, and the orb.
He'll know what it means.