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How to Get Corroded Stone and Effects | Mortal Shell 2

Last Updated: August 24, 2026 at 1:38 PM
Table of Contents

Corroded Stone Overview

Corroded Stone
Corroded Stone
Tarstone TypeCombat
Compatible Weapon• Forgotten Crossbow
• Naylshotte
• Salvaged Trebuchaxe
• Ballistazooka

How to Get Corroded Stone

AreaMap
area
map
LocationSunken Village
How to GetIn a chest when cleansing the Sunken Village Beacon.

Sunken Village can be found inside the Corrupted Gate near the Mushroom Village Gate Beacon.

Corroded Stone Effects

LevelEffect
1Projectiles start dealing damage over time after hitting their target.
2Projectiles deal 8% of the original damage every 7s for 30s.
3Projectiles deal 12% of the original damage every 7s for 30s.
4Projectiles deal 15% of the original damage every 7s for 30s.

How to Upgrade Tarstones

Franz

Every Tarstone can level up to 4 times, growing stronger or shifting into a new effect. To upgrade, give Franz the Etching Needle: Allows players to enhance their Tarstones when they give it to Franz at the Marrow Keep. Quest Item.

Level 2 upgrades cost coins, but you'll also need enough experience first. Just equip a Tarstone and rack up kills to earn EXP toward its next level.

Where to Find the Etching Needle

Find the Etching Needle inside a chest just before the boss fight against the Magdalena, Lady of the Woods. Past the Tarblighted Shepherd where you meet Ruk, turn right to spot it.

Related Guides

List of Tarstones

Tarstones

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