The Ebony Mail, also suffixed as Ebony Mail of Sneaking and Poison Radius Damage, is a Daedric Artifact granted by the Daedric Prince Boethiah upon completing a quest which varies across each title in the series. Initially appearing in The Elder Scrolls: Arena, the only game in the main series that it does not appear in is The Elder Scrolls IV: Oblivion. Worn about the chest as armor, the artifact is typically black in color across games with various magical effects.
During the Third Era, the Eternal Champion was an owner of the mail. It was hidden in Black Marsh after the previous owner, a warrior named Helath Stormbinder lost the favor of Boethiah. Following a strange map, the Eternal Champion eventually found the resting place of the mail and retrieved it for his war against Jagar Tharn.
During the third era, the Hero of Daggerfall was awarded the Ebony Mail by Boethiah after completing an elimination job.
The Ebony Mail is classified as Medium Armor and can be obtained in The Elder Scrolls III: Morrowind by speaking to Tholer Saryoni in Temple Canton. He will offer a quest to retrieve the armor. When worn, the Mail protects the wearer from fire, magicka, and casts a Shield spell upon the Nerevarine.
In Skyrim the Ebony Mail can be obtained by defeating the former Champion of Boethiah during the quest "Boethiah's Calling." It produces a muffle effect while worn and causes 5 points recurring poison damage per second to hostile Characters within radius of the Dragonborn.