Where You Hang Your Enemy's Head…

Walkthrough
This is more of a reward than a quest and allows the Dragonborn to decorate the newest home, the Dawnstar Sanctuary. Only after having completed Hail Sithis!.

Speak to Nazir who directs you to go to Riften and speak with Delvin Mallory.

Employ Delvin Mallory's services
Like other homes, Delvin offers upgrades similar to those offered by stewards in other cities. These include:


 * New Banners — 1000
 * Poisoner's Nook (with Alchemy lab) — 5000
 * Torture Chamber (with victims in shackles) — 5000, leads to Take the Hidden Treasure
 * Secret Entrance — 5000
 * Master Bedroom (with mannequin) — 3000

Purchase any or all of the upgrades to the Dawnstar Sanctuary (19000 in total). Then return to Nazir.