From u/katvalkyrie https://www.reddit.com/r/CalloftheNetherdeep/comments/v5w21j/bazzoxan_additional_factionthemed_sidequests/
The focus of this quest is the home of Tenaryn Hythenos (Male Drow, 346, Arcanist) a reclusive scholar in Bazzoxan. He had been part of the expedition that accidentally opened the rift to the Abyss in decades past. Ashamed of his part in the expedition, he spent his life trying to find a way to close the biggest rift, and make up for unleashing a tide of demons over the city. Over the years he became obsessed with his research and rarely went out, becoming increasingly reclusive and paranoid. His home is generally avoided by the people of Bazzoxan who think that the (occasionally cursed) relics that he has brought back from Betrayer's Rise are haunted.
Ereldra Hythenos was asked by her father Tanaryn to go to Incanter’s Rest in search of another relic. When she returned she was attacked inside her father’s estate and was forced to leave or die. She thought she had seen her father partway up the stairs but he wasn’t acting normal. In reality this is a dybbuk who killed her father and has possessed his corpse.
After being forced from her father’s home she asked Verin Theylss to send Auroran watch soldiers to check things out. They haven’t returned and he wants the party to go check in on things. He tells them “It will go a long way in proving you have what it takes to enter the Betrayer’s Rise”.
Tenaryn Hythenos’ estate is located to the north-east of the center of town, in one of the larger buildings close to the fallen spire.
Before you rises a large, two story manor with stone walls and dark slate roofs, nicer than almost any building you’ve seen so far in town, though some scars of the constant struggles that Bazzoxan faces do mark the house. Red rock dust has blown up against the walls and windows, some of which are cracked and missing panes. You don’t see any lights on in the building, and knocking on the door gives no response.
The few residents in the streets shuffle away with nervous glances.
H1. Foyer
Framed portraits of several goblins, a bugbear, and drow in fine clothes and with symbols of the Luxon adorn the walls of this grand foyer, which features a wide staircase with a sculpted railing. A long, carpeted hall attached to the foyer to the east stretches into darkness. Four sets of doors lead off the foyer, and all stand ajar.
The paintings are of other Hythenos family members Starguide Uraya (goblin), Ishel (drow) (from Dangerous Designs in EGtW), Irvan Wastewalker's previously consecuted life (bugbear)).
H2. Sitting Room
This sitting room contains a fine array of furnishings, a moorbounder rug, and a harp made of a deep purple wood. The curtains are all closed save for a small gap in the north west window.
The rug is a Rug of Smothering and will animate and attack anyone who steps on it.
H3. Study
Floor-to-ceiling shelves line the walls of this room, filled with all kinds of books, texts, and papers. A brass oil lamp sits atop a large desk covered with what looks like someone’s unfinished research. Blood splatter covers the pages and an Aurora Watch Soldier lies disemboweled on the floor.