| Name | KR Name | Group | Description |
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| Kaloo Hammer | 칼루 해머 | Weapon | New possibilities have been discovered for weaponcrafting thanks to the emergence of new monsters since Medzio Diena. |
| Kaman | 카만 | Weapon | A bow modified for more power by archers confident in their arm strength. |
| Kannushi Costume | 칸누시 코스튬 | Armor | |
| Kantravi Bracelet | 칸트라비 브레이슬릿 | Armor | A bracelet which seems to be very effective at blocking ranged attacks. It is said to have been found occasionally deep inside the labyrinth. |
| Kantravi Necklace | 칸트라비 네클리스 | Armor | A necklace which seems to be very effective at blocking ranged attacks. It is said to have been found occasionally deep inside the labyrinth. |
| Karacha Crossbow | 카라챠 크로스보우 | Weapon | A weapon that is easy to reload. |
| Karacha Crossbow (30 Days) | [결속] 카라챠 크로스보우 (30일) | Weapon | A weapon that is easy to reload. |
| Karacha Dagger | 카라챠 대거 | SubWeapon | The fire sprouting from this blade doesn't affect the user, but may instead catch onto enemies. |
| Karas Fragment | 카라스 파편 | Material | It looks like a plain rock.
Obtained from Karases. |
| Karas Mage Gem | 카라스 마법사의 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. |
| Karkash Mushroom | 카르카슈 버섯 | Material | Mushroom that only grows on Karkash. Unpopular due to its nasty taste.
Obtained from Karkashs. |
| Karolis Altar Crystal | 카롤리스 제단의 수정 | Quest | Karolis Altar Crystal Fragment |
| Karolis Altar Fragment | 카롤리스 제단의 파편 | Quest | A destroyed fragment from the main Karolis Altar. |
| Karsto Staff | 카르스토 스태프 | Weapon | According to a rumor, the Chronomancer Master was disappointed after examining the recipe of this weapon once it became publicly available. |
| Kaskara | 카스카라 | Weapon | Due to its ease in manufacturing, this sword is frequently chosen by adventurers as their first replacement for their training sword. |
| Kateen Blaster | 카틴 블라스터 | Weapon | The Ranger Master developed this weapon based on research data on the monsters in the Kateen Forest after Medzio Diena. However, she recommends that no one uses it. |
| Kateen Flower Decoration | 카틴 꽃 장식 | Armor | Headband made with flowers from the Kateen Forest. It emanates a faint blue light. |
| Katzbalger | 카츠발게르 | Weapon | This sword has absorbed the experience of an elite soldier. Whether you are a mercenary or not, if you enjoy fighting you will appreciate this sword. |
| Katzbalger [Event] | [이벤트] 카츠발게르 | Weapon | A weapon this practical is bound to be mass-produced. |
| Kaulas Leather Armor | 카울라스 레더 아머 | Armor | A strong piece of armor made of monster leather and bones. Rumor has it warriors from faraway countries adorned their armor with large bones to represent their skill. |
| Kaulas Leather Boots | 카울라스 레더 부츠 | Armor | A strong piece of armor made of monster leather and bones. Rumor has it warriors from faraway countries adorned their armor with large bones to represent their skill. |
| Kaulas Leather Gloves | 카울라스 레더 글로브 | Armor | A strong piece of armor made of monster leather and bones. Rumor has it warriors from faraway countries adorned their armor with large bones to represent their skill. |
| Kaulas Leather Pants | 카울라스 레더 팬츠 | Armor | A strong piece of armor made of monster leather and bones. Rumor has it warriors from faraway countries adorned their armor with large bones to represent their skill. |
| Kebab Meat | 산적용 고기 | Drug | Meat that looks as if it would be great seared. This also looks quite familiar... |
| Kedoran Alliance Detector | 케도라 상단의 탐지기 | Quest | Detector used for searching items on the upper shelf. |