Black Market

is a power found in. Unlike other powers, it's not restricted to once a day use.

Acquisition
It is one of three possible powers gained from the quest "Black Book: Untold Legends".

Effect
"Summons a Dremora butler for 15 seconds to carry your excess items."

When activated, a Dremora Merchant appears and offers to trade much like a regular merchant. He will buy any type of item and sells Daedric armor and weapons. He typically has 2000 available for trading, which resets after three days.