---
title: "Unique Iron Wall Stone (Reinforcement)"
url: "https://karos-wiki.pages.dev/en/item-620105"
lang: "en"
description: "When equipped on Buff Super Skill which is effective for yourself and your team, Reduce Critical Damage will be increased by +10%. (Combined via Instructer NPC)"
---

# Unique Iron Wall Stone (Reinforcement)

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Free

When equipped on Buff Super Skill which is effective for yourself and your team, Reduce Critical Damage will be increased by +10%. (Combined via Instructer NPC)

## 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.

How to obtain this item is not known.

Unique Iron Wall Stone (Reinforcement)

- **Category:** Materials
- **Sells to NPCs:** Yes
- **Sells to players / trade:** Yes
- **Can be stored:** Yes
- **Usable in:** Normal maps
- **Stack limit:** 10
- **Super stone family:** [Iron wall (critical damage reduction)](https://karos-wiki.pages.dev/en/ssfam-6201) · Buff (self + party)

#### In other languages

tr: Eşsiz Demir Duvar Taşı (Takviye) · de: Einzigartiger Eisenwandstein (Verstärkung) · es: Piedra única de la pared de hierro (Refuerzo) · fr: Pierre unique de mur de fer (Renforcement) · pl: Unikalny kamień żelaznej ściany (wzmocnienie) · pt: Pedra única da parede do ferro (reforço) · ru: Уникальный камень железной стены (Усиление)