Unstable Stone Overview
| Unstable Stone | |
|---|---|
 | |
| Tarstone Type | Combat |
| Compatible Weapon | • Forgotten Crossbow • Caged Hystrix • Triarch Repeater |
How to Get Unstable Stone
| Area | Map |
|---|---|
 |  |
| Location | Castigator's Keep |
| How to Get | Inside a Chest behind a hidden wall. |
Unstable Stone Effect
| Level | Effect |
|---|---|
| 1 | Hitting the same enemy 5 times triggers an explosion that deals splash damage. |
| 2 | The triggered explosion deals 30 splash damage. |
| 3 | The triggered explosion deals 40 splash damage. |
| 4 | The explosion triggers after 4 hits. |
How to Upgrade Tarstones
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.
