Waterdeep:Stone of Golorr

The Stone of Golorr is an artifact of great power, able to erase information from the minds and documents from everyone on the planet, save for the one using it. It was the object stolen by the drow from the Gralhund Villa. It has wound up in the possession of Captain Zardoz Zord, and he says it can reveal the location of the vault in which Dagult Neverember hid his 500,000 dragons. After all, what better way to hide your stole valuables than if nobody on the planet knows where the location is?
The Stone has three "eyes", which are missing. Without them, the Stone is blinded and cannot do anything. Captain Zord has recruited you to recover the eyes for him, so that he might obtain Neverember's treasure for himself.
First Eye
The first Eye of Golorr was in the possession of the Xanathar Guild. You successfully stole it on behalf of Captain Zord, and delivered it to him.
Second Eye
The second Eye of Golorr is in the possession of the Zhentarim, but not the Doom Raiders faction which Ludwig belongs to. While searching for the Eye, you encountered Manshoon, who has allowed you to live in exchange for your service in retrieving the Eyes of Golorr for him.