 Onyx Ring#12001 · Armor | 50 | 45 | Finger | Uncommon |
 Ahn'kahar Onyx Neckguard#49989 · Armor | 264 | 80 | Neck | Epic |
| Ahn'kahar Onyx Neckguard#50647 · Armor | 277 | 80 | Neck | Epic |
 Onyxia Scale Cloak#15138 · Armor | 60 | 55 | Back | Rare |
 Onyxia Scale Breastplate#15141 · Armor | 62 | 57 | Chest | Epic |
 Onyx Grips#35903 · Armor | 138 | — | Hands | Uncommon |
 Onyx Choker#7548 · Armor | 46 | 41 | Neck | Uncommon |
| Onyx Choker#12032 · Armor | 48 | 43 | Neck | Uncommon |
 Overlord's Onyx Band#19912 · Armor | 68 | 60 | Finger | Rare |
 Omor's Unyielding Will#27464 · Armor | 115 | 70 | Neck | Rare |
 Omokk's Girth Restrainer#13959 · Armor | 60 | — | Waist | Rare |
 Omega Orb#7749 · Armor | 41 | — | Held in off-hand | Uncommon |
 Oilskin Leggings#9414 · Armor | 46 | 40 | Legs | Rare |
 Oilrag Handwraps#16741 · Armor | 31 | — | Hands | Uncommon |
 OLDMonster - Hands, Plate Silver#3245 · Armor | 1 | 1 | Hands | Poor |
 Oil-stained Cloak#3153 · Armor | 9 | — | Back | Common |
 Oil-Stained Tarp#38354 · Armor | 150 | 74 | Back | Rare |
 Olaf's All Purpose Shield#9404 · Armor | 42 | 37 | Shield | Rare |
 Earring of Soulful Meditation#30665 · Armor | 128 | 70 | Trinket | Epic |
 Fisherman's Earwarmer#37936 · Armor | 146 | — | Head | Uncommon |
 Ogron's Sash#13117 · Armor | 42 | 37 | Waist | Rare |
 Ogre-Crushing Wristguards#39332 · Armor | 162 | — | Wrists | Uncommon |
 Ogreseer Tower Boots#13282 · Armor | 59 | 54 | Feet | Rare |
 Ogreseer Fists#11665 · Armor | 54 | 49 | Hands | Rare |
 Ogre Forged Hauberk#18530 · Armor | 62 | 57 | Chest | Rare |
 Ogremind Ring#1993 · Armor | 36 | 31 | Finger | Uncommon |
 Murkblood Oven Mitts#25584 · Armor | 105 | — | Hands | Uncommon |
 Wastewalker Tunic#28264 · Armor | 115 | 70 | Chest | Rare |
 Wastewalker's Gauntlets#20712 · Armor | 63 | — | Hands | Rare |
 Wastewalker Shoulderpads#27797 · Armor | 115 | 70 | Shoulder | Rare |