| | Name | KR Name | Group | Description |
|---|
| Old Gorithos | 오래된 고리토스 | Weapon | A bow preferred by the Cavalry. |
| Old Hard Leather Armor | 오래된 하드 레더 아머 | Armor | Never loses its toughness thanks to the ingredients used in this armor. |
| Old Short Rod | 오래된 숏 로드 | Weapon | A rod that all students of magic will use. |
| One More Time Day 1 Box (7 Days) | 다시 한 번 1일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 10 Box (7 Days) | 다시 한 번 10일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 2 Box (7 Days) | 다시 한 번 2일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 3 Box (7 Days) | 다시 한 번 3일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 4 Box (7 Days) | 다시 한 번 4일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 5 Box (7 Days) | 다시 한 번 5일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 6 Box (7 Days) | 다시 한 번 6일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 7 Box (7 Days) | 다시 한 번 7일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 8 Box (7 Days) | 다시 한 번 8일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| One More Time Day 9 Box (7 Days) | 다시 한 번 9일차 상자 (7일) | Event | Right-click to use and acquire the contents of the box. |
| Onmyoji Origin Costume | 음양사의 본향의상 코스튬 | Armor | An outfit designed to celebrate and remember one's Onmyoji origins. |
| Onmyoji Origin Special Costume | 음양사의 본향의상 스페셜 코스튬 | Armor | An outfit designed to celebrate and remember one's Onmyoji origins. |
| Operor Gem | 오페러의 젬 | | A gem that can be found in a dungeon. It is able to enhance equipment by equipping it in a socket. Cannot be used with same effect simultaneously. Right-click to insert it to an equipment. |
| Operor Thorn | 오페러의 껍질 | Material | Due to its small size, only experienced crafters are able to use this properly.
Obtained from Operors. |
| Operor's Stinger | 오페러의 침 | Quest | An Operor's stinger that has the power to purify corrupted magic crystals. |
| Opinion about the Nheto Forest Painting | 네토 숲의 단풍화에 대한 소견서 | Book | Opinion about the Nheto Forest Paintings written by Chronomancer Master Lucid Winterspoon. Right-click to read. |
| Oracle Costume | 오라클 코스튬 | Armor | Soft and light, this costume is said to comfort and calm your body and soul. |
| Oracle Master's Note | 오라클 마스터의 쪽지 | Quest | A note containing the location of the Pied Piper Master.
The Oracle Master's advice was to write down the list of tasks that you will be given once you meet the Pied Piper Master in this note. |
| Orange Candy | 오렌지 맛 사탕 | Armor | An orange-flavored chocolate candy worn as hair accessory.{nl}Can be exchanged for medals at the Exchange Shop. |
| Orange Cat Ears | 주황색 고양이 귀 | Armor | This will gain you affection from a certain animal. |
| Orange Contact Lenses | 오렌지색 렌즈 | Armor | Colored contact lenses can alter the color of your eyes. |
| Orange Dandel Gem | 주황 단델의 젬 | | A gem that can be found in a dungeon. It is able to enhance equipment by equipping it in a socket. Cannot be used with same effect simultaneously. Right-click to insert it to an equipment. |
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