In 1988, TSR published The Magister - A Sourcebook For The Forgotten Realms. Written by Ed Greenwood (creator of the Forgotten Realms) and Steve Perrin (legendary designer of RuneQuest and Elfquest), it contained a wide variety of spellbooks and magic items.
This book updates the magic items from The Magister to fifth edition Dungeons & Dragons rules. Each has been carefully and thoughtfully updated, but DMs must be forewarned: Most of them are very powerful indeed, and are bound to have a profound impact on your game. The acquisition of one of them should be a character-defining quest, and their distribution should never be taken lightly.
Most of the items described hereafter are unique, irrespective of their “rarity.” One might be found in a dragon’s hoard and another in a king’s vaults, and yet another carried by a bandit chieftain who has no idea how legend has come to touch their life. Each item’s entry starts with a bit of lore so you can use it to build the item’s mystical, legendary feel.
- from the publisher's blurb