---
title: "Blue Crystal Rune"
url: "https://karos-wiki.pages.dev/en/item-900002"
lang: "en"
description: "Usable only in sieges. Maps where it cannot be used: Guild War Arena, Descada Battlefield (Daily Wars), Sky Duel Arena, Descada Battlefield (Lv. 35-55)…"
---

# Blue Crystal Rune

[Home](https://karos-wiki.pages.dev/en/) › [Items](https://karos-wiki.pages.dev/en/items)

Bound · not storable

Usable only in sieges.

## Usable in

Normal maps

Maps where it cannot be used: [Guild War Arena](https://karos-wiki.pages.dev/en/map-1900339), [Descada Battlefield (Daily Wars)](https://karos-wiki.pages.dev/en/map-9000000), [Sky Duel Arena](https://karos-wiki.pages.dev/en/map-9000199), [Descada Battlefield (Lv. 35-55)](https://karos-wiki.pages.dev/en/map-9003555), [Descada Battlefield (Lv. 56-75)](https://karos-wiki.pages.dev/en/map-9005675), [Descada Battlefield (Lv. 76-95)](https://karos-wiki.pages.dev/en/map-9007695), [Descada Battlefield (Lv. 96-105)](https://karos-wiki.pages.dev/en/map-9009600)

On other maps the game says “You cannot use this item on this map”. Additional restrictions may apply.

## On use

|   |   |
| --- | --- |
| Duration | 5 min |
| Stacking group | [Details in the guide →](https://karos-wiki.pages.dev/en/bfgrp-60165) |

### Items in the same group (3)

[Red Crystal Rune](https://karos-wiki.pages.dev/en/item-900001) · [Yellow Crystal Rune](https://karos-wiki.pages.dev/en/item-900003) · [Black Crystal Rune](https://karos-wiki.pages.dev/en/item-900004)

The item can't be used while the same effect is active. If an effect of the same kind is active, a higher version asks for confirmation and replaces it; a lower version can't be used until the effect ends. A refused item is not used up.

How to obtain this item is not known.

Blue Crystal Rune

- **Sells to NPCs:** No
- **Sells to players / trade:** No
- **Can be stored:** No
- **Usable in:** Normal maps

#### In other languages

tr: Mavi kristal Rünü · de: Blaue Kristallrune · es: Runa de cristal azul · fr: Rune de cristal bleu · pl: Runa niebieskiego kryształu · pt: Runa de cristal azul · ru: Руна голубого кристалла