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| Name | Type | Zone |
| Oasis Fungi | Resource | The Commonlands |
| An Oasis in the Desert Page 16 | | Maj'Dul |
| An Oasis in the Desert Page 20 | Interactive Object | Maj'Dul |
| An Oasis in the Desert Page 22 | Interactive Object | Maj'Dul |
| Oasis Shrubbery | Resource | The Commonlands |
| Obelisk | | Fallen Gate |
| Odd Markings, Claymore Slots | | Sanctum Of The Scaleborn, Tenebrous Tangle |
| Ogre Wall 1 | | Cleansing Of The Cove, The Lost Village Of Kugup |
| Ogrebane Arena | Point of Interest | Kaladim |
| An Oil Painting Of A Claymore | | The Vaults Of El'Arad |
| An Old Birdcage | Interactive Object | The Mystic Lake |
| Old Grove Trail Guide | | Zek, The Orcish Wastes |
| Old Kelethin | Point of Interest | Greater Faydark |
| An Old Powder Keg | | Temple Street, South Freeport |
| An Old Vial | | The Commonlands |
| Olthox | | Sundered Splitpaw: Anvilpaw's Grotto |
| Omenfish School | Resource | Fens Of Nathsar |
| Opal Pond | Point of Interest | Greater Faydark |
| An Open Grave | | The Thundering Steppes |
| Opposition | | The Vaults Of El'Arad |
| Orange Crystal | | Zek, The Orcish Wastes |
| Oratory of Naar'Yora | Point of Interest | Palace of the Awakened |
| Orc Encampment | Point of Interest | Zek, The Orcish Wastes |
| Orc Hill | Point of Interest | Greater Faydark |
| Orc Large Tent | | Zek, The Orcish Wastes, Deathfist Citadel |
| Orc Lugger Depot Cart | | Zek, The Orcish Wastes |
| Orc Lugger Depot Crate | | Zek, The Orcish Wastes |
| Orc Lugger Tent | | Zek, The Orcish Wastes |
| Orc Outpost | Point of Interest | Zek |
| Orc Outpost | Point of Interest | Zek, The Orcish Wastes |
| Orc Skull | | The Pillars Of Flame, the Barren Sky, the Living Tombs, the Vault Of Dust, scornfeather Roost, The Dismal Den |
| Orc Society Shield | Interactive Object | The Commonlands |
| Orc Tent | | Nektulos Forest, zek, The Orcish Wastes, the Commonlands, Invasion Of The Vale |
| An Orcish Key | | Blackburrow |
| Ornamental Geode | | Kylong Plains |
| Orosu Tablet | | The Living Tombs |
| Osseous Lumber | Resource | The Bonemire |
| Outer Sebilis | Point of Interest | Kunzar Jungle |
| Overfoot Circle | Point of Interest | Rivervale |
| Overfoot Circle | Point of Interest | Rivervale |
| Overgrown Bed Of Greenslade | Resource | The Feerrott |
| An Overlord Bed | | The Defector |
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