| Name ▲ | Type | Type Full Name | Rarity | Source | Source Full Name | Base Item |
|---|---|---|---|---|---|---|
| Orb of the Veil | WI | Wondrous Item | very rare | EGW | Explorer's Guide to Wildemount | |
| Orc Stone | WI | Wondrous Item | uncommon | IDRotF | Icewind Dale: Rime of the Frostmaiden | |
| Orcsplitter | M | Melee Weapon 2014 | legendary | PotA | Princes of the Apocalypse | greataxe|phb |
| Orcus Figurine | WI | Wondrous Item | unknown (magic) | CM | Candlekeep Mysteries | |
| Ornithopter of Flying | WI | Wondrous Item | very rare | WBtW | The Wild Beyond the Witchlight | |
| Orrery of the Wanderer | OTH | Other | artifact | AI | Acquisitions Incorporated | |
| Orzhov Guild Signet | RG|DMG | Ring 2014 | uncommon | GGR | Guildmasters' Guide to Ravnica | |
| Orzhov Keyrune | WI | Wondrous Item | rare | GGR | Guildmasters' Guide to Ravnica | |
| Outer Essence Shard | SCF | Spell Casting Focus 2014 | rare | TCE | Tasha's Cauldron of Everything | |
| Outer Essence Shard (Chaotic) | SCF | Spell Casting Focus 2014 | rare | TCE | Tasha's Cauldron of Everything |