D20 Relics

From the publisher:

Since the dawn of role playing games, magical artifacts have held a special place in the lore of fantasy gaming. Some of the most popular items amongst gamers are powerful, unique artifacts whose detailed histories and unique traits cause them to stand out from the pack of magical swords, potions, and other items. Relics presents a bevy of artifacts that DMs can insert into their games. Each artifact includes a detailed history, complete rules for its use, and adventure hooks to inspire the imagination and enrich a d20 campaign.