Let's talk magic items. The World of Greyhawk setting has one of the richest collection of spells, magic items and artifacts in D&D history. Because time is short and editions come and go, it's easy to overlook, underuse or completely miss alot of them. Concerning cool and interesting magic items, here is a short list of some that have never graced my gaming table (or so I recall).
1. Razor Claws of Chakyik (Greyhawk Adventures) Anyone can carry a magic sword, these gauntlets turn your character into Wolverine!
2. Ring of Boccob (Unearthed Arcana) Who wouldn't want an item named for the god of magic?
3. Bonerod (Iuz the Evil) Shoots bone shards and animates dead? Yes please.
4. Black Opal of Syrul (Scarlet Brotherhood) I don't care what it does, it sounds evil.
5. Leomund's Labile Locker (Temple of Elemental Evil) Bag of Holding? Pshaw!
6. Tenser's Sword of Deadly Strikes (Return of the Eight) Tenser can get medieval once in a while.
7. Green Eye of Johydee (Slavers) Your thief is not sneaky enough? Try this item out.
8. Oracles of Greyhawk (Greyhawk Adventures) Kind of like crystal balls, but for info not spying.
9. Shoes of Fharlanghn (Land Beyond the Magic Mirror) Don't leave home on a quest without them.
10. Tome of Recording (Vale of the Mage) A book that automatically records conversations in up to six languages. Why haven't I used this before?
For 3rd edition and later DMs, you can get an excellent download of converted Greyhawk magic items HERE by Rick "Duicarthan" Miller. Even if you don't play 3e, it is a good catalogue of most of the aforementioned items originally scattered throughout many older publications.