The additional download files for Patrons can be found here or from the Master Map Index or the Waterdeep Dragon Heist Index.
This is my interpretation of Mausoleum - Encounter 4 from the module Waterdeep Dragon Heist.
Mausoleum. In Waterdeep's City of the Dead lies many family mausoleums. The graveyard is open to Waterdavians during the day and doubles as a park and public space; but closes at night as hundreds of driftglobes descend to the area for reasons unknown.
Mausoleum - Waterdeep Dragon Heist is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.