Aubade

The classification Aubade, Supreme Treasures of the Netherworld (奈落の至宝, Naraku no Shihō) is not an official grade classification of Artifacts by the Delver Guild HQ.undefined

Description
This classification sprang up from the rumor that things that threaten the value of the Abyss are kept secret or destroyed rather than auctioned off.undefined

Triva

 * According to Shiggy, Reg could classify as an Aubade as his body, by his estimation, seems to be a bundle of Special Grade Artifacts and might even be one of the most valuable finds in the history of the Abyss.