Barrityl's Burden

The Cursed Ring of Ironic Punishment, labelled simply Slave RIng in inventory, is an enchanted ring worn by Baeloth Barrityl, a chaotic evil drow sorcerer and potential companion found (only in BG:EE, and only by parties of level 5 or higher) in Larswood. Although it is cursed in the sense that it cannot be removed, its effects are entirely beneficial to the wearer. Such is the nature of irony.

In-Game Description
"Cursed Ring of Ironic Punishment

Equipped abilities:

—The wearer can memorize 2 extra 2nd-level spells, 1 extra 3rd-level spell and 1 extra 4th-level spell"