All Mortal Shell 2 Tarstones and upgrade effects

⚡ QUICK ANSWER
Tarstones are Mortal Shell 2’s build-defining modifiers for Support slots, weapons, and Sidearms; use this effect reference to choose which ones to equip and upgrade first.

Tarstones can reinforce a familiar playstyle or transform how an attack behaves. This reference contains 79 Tarstone names and supplied effect-line entries; collectible totals vary between 73 and 75 because some available text appears as separate effect lines rather than named stones.

Contents hide

Quick answer: what Tarstones do
Mortal Shell 2 Tarstones at a glance
How Tarstone slots, XP, and Tarforge upgrades work
How to choose Tarstones for your build
Mortal Shell 2 Tarstone effects and upgrade changes
Tarstone icon reference
Frequently Asked Questions
How to use this Tarstone reference
Complete reference: Resolve-consuming sidearm effects
More Mortal Shell II guides

Quick answer: what Tarstones do

Tarstones provide passive bonuses, altered attacks, weapon and Sidearm infusions, projectile modifiers, and Resolve-powered abilities. Compatibility determines which Support, weapon, or Sidearm slot can accept each one.

Equipped Tarstones earn Tarstone XP through combat and enemy kills. Once upgrades are unlocked, eligible stones can be improved at the Tarforge. This is an effects and upgrade-planning reference, not a pickup-location route.

Mortal Shell 2 Tarstones at a glance

Tarstone	Effect
Accursed Stone	Consume Resolve to infuse your Sidearm with Curse.
Acolyte’s Stone	Consume Resolve to perform a Charged Light Attack.
Arbiter’s Prize	Consume Resolve to infuse your Weapon with Bloodcurse.
Auspicious Stone	Improves melee Critical Chance.
Barrage Stone	Consume Resolve to launch a heavy round that scatters explosive projectiles below its target.
Berserker’s Stone	Improves melee damage as your Health falls.
Blackblood Stone	Projectiles explode in mid-air and deal splash damage.
Bulwark Stone	Provides Damage Reduction to all characters.
Captive’s Scabstone	Consume Resolve to unleash a violent close-range weapon arc.
Charged Stone	Your Sidearm charges faster.
Clerik’s Stone	Grants a special Heavy Combo Finisher.
Clockwork Shardstone	Consume Resolve over time to keep the weapon’s chainsaw spinning.
Colossus Stone	Consume Resolve to send shockwaves through nearby foes.
Confessor’s Keepsake	Consume Resolve to charge your Sidearm and fire a devastating shot.
Conqueror’s Reward	Consume Resolve to perform a series of swift, piercing thrusts.
Corroded Stone	Projectiles deal damage over time after hitting.
Curseblood Stone	Effect not listed.
Deadeye Stone	Improves ranged Critical Damage.
Devout Stone	Improves Resolve gain from melee attacks.
Duality Stone	Your Weapon light attack combo strikes twice.
Emberseed Stone	Consume Resolve to infuse your Sidearm with Burn.
Enfeebling Stone	Projectiles inflict Fragile.
Frostshard Stone	Effect not listed.
Fulminant Stone	Consume Resolve to fire a heavy round that triggers multiple explosions.
Fusillade Stone	At the required Resolve threshold, unleash consecutive shots.
Gloombound Stone	Slain foes drop more Gloom.
Grudge Stone	Your Weapon deals a guaranteed Critical Hit.
Hag Stone	Effect not listed.
Hand of Rock	Consume Resolve to unleash homing projectiles.
Headsman’s Stone	Improves melee Critical Damage.
Hexapod Core	Consume Resolve to carve through enemies with rapid strikes.
Infested Stone	Consume Resolve to fire a clinging projectile that triggers a massive explosion after a brief delay.
Inflamed Clawstone	Effect not listed.
Infused Stone	Consume Resolve to throw your Weapon through multiple targets.
Ironpiercer’s Stone	Projectiles pierce through enemies.
Justiciar’s Stone	Slain foes drop more Coin.
Killing an enemy with your Sidearm:	No separate effect listed.
Lost Clotstone	Consume Resolve to spin and release your Weapon with brutal force.
Magdalena’s Memento	Consume Resolve to rise and unleash a flurry of ruthless strikes.
Marksman’s Stone	Improves ranged Critical Chance.
Meteor Stone	Consume Resolve to fire a continuous Sidearm beam that deals damage over time.
Monarch’s Vestige	Effect not listed.
Myriad Stone	Your Sidearm fires multiple projectiles without consuming additional Resolve.
Nightgrasp Stone	Effect not listed.
On killing an enemy:	No separate effect listed.
Parasitic Stone	Slaying foes grants the stone Leech stacks.
Projectiles that strike critically deal Break Damage	No separate effect listed.
Pulse Stone	Projectile impacts create a shockwave that pulls enemies inward.
Retribution Stone	Improves Riposte damage.
Rupturing Stone	Effect not listed.
Scholar’s Wormstone	Effect not listed.
Serpent Stone	Effect not listed.
Shattering Stone	Improves melee Stagger Damage.
Shrike Stone	Consume Resolve to leap and plunge your Weapon into the ground.
Shuddering Stone	Projectile impacts generate a Knockback shockwave.
Siegebreaker’s Stone	Improves ranged Stagger Damage.
Solnir Shard	Effect not listed.
Spite Stone	Improves ranged damage as your Health falls.
Splitting Stone	Effect not listed.
Squall Stone	Projectiles spin temporarily after hitting their target.
Stillblade’s Stone	Grants a special Light Combo Finisher.
Strange Remnant	Consume Resolve to unleash a stream of projectiles that chain between multiple targets.
Summoning Stone	Consume Resolve to summon the last slain foe as an ally.
Tarred Fragment	Consume Resolve to fire rapidly spinning tethered projectiles.
Thief’s Stone	Striking foes grants Warp.
Torpor Stone	Effect not listed.
Tyrant’s Stone	Effect not listed.
Unstable Stone	Repeated hits on one enemy trigger a splash-damage explosion.
Unwieldy Stone	Improves Critical Chance.
Unyielding Stone	Effect not listed.
Viletongue Hedron	Effect not listed.
Volatile Fragment	Enemies killed by ranged attacks explode and deal splash damage.
Voltaic Amber	Effect not listed.
Voltaic Crown	Effect not listed.
Warden’s Stone	Effect not listed.
Weeping Stone	Effect not listed.
Wounding Stone	Melee attacks inflict Perforation.
Wretchcaller’s Stone	Effect not listed.
Zealot’s Stone	Effect not listed.

The list spans dependable passive bonuses, modifiers that reshape normal attacks, and active techniques fueled by Resolve. Effect-line entries remain verbatim when a corresponding Tarstone label is unavailable.

How Tarstone slots, XP, and Tarforge upgrades work

Check both a Tarstone’s category and its equipment compatibility before investing in it. Even a strong effect will remain unavailable when the chosen slot, Weapon, or Sidearm cannot accept that stone.

Slot or system	Use
Support	Four character slots for passive critical, defensive, resource, and reward bonuses.
Combat	Changes melee combos, projectile behavior, or another part of a normal attack.
Infusion	Adds an elemental or status property to compatible attacks.
Ability	Grants an active technique, commonly powered by Resolve.
Weapon compatibility	A melee Weapon can accept compatible Ability, Combat, and Infusion Tarstones.
Sidearm compatibility	A Sidearm can accept compatible Ability, Combat, and Infusion Tarstones.
Upgrade levels	Tarstones have up to four levels, with later levels improving or transforming their effects.
Tarstone XP	Accumulates for an equipped stone during combat and enemy kills; each new tier requires more XP.
Tarforge	Upgrades eligible Tarstones in Marrow Keep after the Etching Needles unlock the relevant forge function associated with Franz.

Tarforge upgrades use Coin, while later progression can involve Tarcore. The required XP must be earned again after each level increase, so stones left outside the active loadout will not progress.

QUICK WIN

Equip a Tarstone you expect to reuse before clearing an enemy-heavy area. Its level belongs to the stone, so it remains upgraded when moved to another compatible Weapon or Sidearm.

How to choose Tarstones for your build

Start with the attack you use most, then use the remaining slots to correct a weakness. A melee setup that generates Resolve reliably can sustain a powerful Ability stone, whereas a Sidearm-centered loadout gains more from projectile behavior, charging, and ranged critical bonuses.

Build goal	Look for
Melee critical	Auspicious Stone for Critical Chance, Headsman’s Stone for Critical Damage, and Grudge Stone for guaranteed critical strikes.
Ranged critical	Marksman’s Stone for Critical Chance, Deadeye Stone for Critical Damage, and the Break Damage effect line for critical projectiles.
Resolve ability	Devout Stone for melee Resolve gain, paired with an Ability stone that supplies missing range or crowd pressure.
Projectile or Sidearm	Charged Stone, Myriad Stone, Ironpiercer’s Stone, Pulse Stone, or another compatible projectile modifier.
Status or infusion	Accursed Stone, Arbiter’s Prize, Emberseed Stone, Corroded Stone, Enfeebling Stone, or Wounding Stone.
Survivability	Bulwark Stone for broad Damage Reduction. Berserker’s Stone and Spite Stone reward low Health but do not protect you.
Farming	Gloombound Stone for additional Gloom or Justiciar’s Stone for additional Coin.
Crowd control	Pulse Stone for grouping, Shuddering Stone for Knockback, or Blackblood Stone and Volatile Fragment for splash damage.

For a Resolve-heavy setup, pair one dependable generator with an ability you can activate at useful moments. Projectile builds should select a specific job—piercing, grouping, Knockback, delayed explosions, or splash damage—rather than filling several slots with effects that address the same problem.

Mortal Shell 2 Tarstone effects and upgrade changes

Tarstone	Upgrade effect
Accursed Stone	Consume Resolve to infuse your Sidearm with Curse.
Acolyte’s Stone	Consume Resolve to perform a Charged Light Attack. Higher levels add Critical Chance to the charged attack and then improve its Critical Damage.
Arbiter’s Prize	Consume Resolve to infuse your Weapon with Bloodcurse. Upgrades extend the infusion from a limited number of strikes to a persistent effect.
Auspicious Stone	Improves melee Critical Chance.
Barrage Stone	Consume Resolve to launch a heavy round that detonates above the target, scattering explosive projectiles below.
Berserker’s Stone	Improves melee damage the lower your Health is.
Blackblood Stone	Projectiles explode mid-air and deal splash damage.
Bulwark Stone	Provides Damage Reduction to all characters.
Captive’s Scabstone	Consume Resolve to swing your Weapon in a violent arc, striking down all who stand close.
Charged Stone	Your Sidearm charges up faster.
Clerik’s Stone	Grants access to a special Heavy Combo Finisher.
Clockwork Shardstone	Consume Resolve over time to hold your Weapon before you with its chainsaw spinning at full speed.
Colossus Stone	Consume Resolve to thrust your Weapon into the ground and send shockwaves rippling through nearby foes.
Confessor’s Keepsake	Consume Resolve to charge your Sidearm, firing a powerful, devastating shot.
Conqueror’s Reward	Consume Resolve to drive your Weapon forward in a series of swift, piercing thrusts.
Corroded Stone	Projectiles start dealing damage over time after hitting their target.
Curseblood Stone	Effect not listed.
Deadeye Stone	Improves ranged Critical Damage.
Devout Stone	Improves Resolve gain from melee attacks.
Duality Stone	Your Weapon light attack combo strikes twice. Upgrades expand the doubled effect from the first attack to later attacks in the combo.
Emberseed Stone	Consume Resolve to infuse your Sidearm with Burn.
Enfeebling Stone	Projectiles inflict Fragile.
Frostshard Stone	Effect not listed.
Fulminant Stone	Consume Resolve to fire a heavy-caliber round that triggers multiple explosions around the target.
Fusillade Stone	At the required Resolve threshold, unleash a flurry of consecutive shots.
Gloombound Stone	Slain foes drop more Gloom.
Grudge Stone	Your Weapon deals a guaranteed Critical Hit. Upgrades reduce the number of attacks required to trigger it.
Hag Stone	Effect not listed.
Hand of Rock	Consume Resolve to unleash a swarm of relentless homing projectiles.
Headsman’s Stone	Improves melee Critical Damage.
Hexapod Core	Consume Resolve to carve through enemies with a rapid succession of strikes.
Infested Stone	Consume Resolve to fire a clinging projectile that triggers a massive explosion after a brief delay.
Inflamed Clawstone	Effect not listed.
Infused Stone	Consume Resolve to throw your Weapon to strike multiple targets before it circles back to you.
Ironpiercer’s Stone	Projectiles pierce through enemies.
Justiciar’s Stone	Slain foes drop more Coin.
Killing an enemy with your Sidearm:	No separate effect listed.
Lost Clotstone	Consume Resolve to spin in place and release your Weapon with brutal force.
Magdalena’s Memento	Consume Resolve to rise into the air and unleash a flurry of ruthless strikes.
Marksman’s Stone	Improves ranged Critical Chance.
Meteor Stone	Consume Resolve to perform a Sidearm Ability that fires a continuous beam that deals damage over time.
Monarch’s Vestige	Effect not listed.
Myriad Stone	Your Sidearm fires multiple projectiles in an arc without consuming additional Resolve.
Nightgrasp Stone	Effect not listed.
On killing an enemy:	No separate effect listed.
Parasitic Stone	Slaying foes grants the stone Leech stacks. Higher levels grant more stacks per kill.
Projectiles that strike critically deal Break Damage	No separate effect listed.
Pulse Stone	Projectiles generate a shockwave on impact that pulls enemies in.
Retribution Stone	Improves Riposte damage.
Rupturing Stone	Effect not listed.
Scholar’s Wormstone	Effect not listed.
Serpent Stone	Effect not listed.
Shattering Stone	Improves melee Stagger Damage.
Shrike Stone	Consume Resolve to leap high and plunge your Weapon into the ground ahead.
Shuddering Stone	Projectiles generate a Knockback shockwave on impact.
Siegebreaker’s Stone	Improves ranged Stagger Damage.
Solnir Shard	Effect not listed.
Spite Stone	Improves ranged damage the lower your Health is.
Splitting Stone	Effect not listed.
Squall Stone	Projectiles spin in place for a duration after hitting their target.
Stillblade’s Stone	Grants access to a special Light Combo Finisher.
Strange Remnant	Consume Resolve to unleash a stream of projectiles that chain between multiple targets.
Summoning Stone	Consume Resolve to summon the last slain foe to fight on your side.
Tarred Fragment	Consume Resolve to fire multiple tethered projectiles, spinning at high speed.
Thief’s Stone	Striking foes grants you Warp.
Torpor Stone	Effect not listed.
Tyrant’s Stone	Effect not listed.
Unstable Stone	Hitting the same enemy enough times triggers an explosion that deals splash damage.
Unwieldy Stone	Improves Critical Chance.
Unyielding Stone	Effect not listed.
Viletongue Hedron	Effect not listed.
Volatile Fragment	Enemies dying by a ranged attack will explode, dealing splash damage.
Voltaic Amber	Effect not listed.
Voltaic Crown	Effect not listed.
Warden’s Stone	Effect not listed.
Weeping Stone	Effect not listed.
Wounding Stone	Melee attacks inflict Perforation. Higher levels increase the stacks applied by each strike.
Wretchcaller’s Stone	Effect not listed.
Zealot’s Stone	Effect not listed.

Entries marked Effect not listed remain neutral rather than assigning an unsupported category, behavior, location, or value.

Tarstone icon reference

These visuals come from the in-game assets for Mortal Shell 2. They are included as a practical identification reference for the names and entries in this guide.

Accursed Stone in-game icon in Mortal Shell II — Accursed Stone — extracted in-game icon from Mortal Shell II.

Charged Stone in-game icon in Mortal Shell II — Charged Stone — extracted in-game icon from Mortal Shell II.

Colossus Stone in-game icon in Mortal Shell II — Colossus Stone — extracted in-game icon from Mortal Shell II.

Deadeye Stone in-game icon in Mortal Shell II — Deadeye Stone — extracted in-game icon from Mortal Shell II.

Fusillade Stone in-game icon in Mortal Shell II — Fusillade Stone — extracted in-game icon from Mortal Shell II.

Infested Stone in-game icon in Mortal Shell II — Infested Stone — extracted in-game icon from Mortal Shell II.

Infused Stone in-game icon in Mortal Shell II — Infused Stone — extracted in-game icon from Mortal Shell II.

Myriad Stone in-game icon in Mortal Shell II — Myriad Stone — extracted in-game icon from Mortal Shell II.

Rupturing Stone in-game icon in Mortal Shell II — Rupturing Stone — extracted in-game icon from Mortal Shell II.

Serpent Stone in-game icon in Mortal Shell II — Serpent Stone — extracted in-game icon from Mortal Shell II.

Shuddering Stone in-game icon in Mortal Shell II — Shuddering Stone — extracted in-game icon from Mortal Shell II.

Spite Stone in-game icon in Mortal Shell II — Spite Stone — extracted in-game icon from Mortal Shell II.

Splitting Stone in-game icon in Mortal Shell II — Splitting Stone — extracted in-game icon from Mortal Shell II.

Squall Stone in-game icon in Mortal Shell II — Squall Stone — extracted in-game icon from Mortal Shell II.

Torpor Stone in-game icon in Mortal Shell II — Torpor Stone — extracted in-game icon from Mortal Shell II.

Unstable Stone in-game icon in Mortal Shell II — Unstable Stone — extracted in-game icon from Mortal Shell II.

Unyielding Stone in-game icon in Mortal Shell II — Unyielding Stone — extracted in-game icon from Mortal Shell II.

Frequently Asked Questions

Does every Tarstone in this reference include a location?

No. Tarstones can come from story progression or pickups across different locations, but these tables are organized around effects and upgrade planning rather than individual routes, merchant inventories, or pickup directions.

Why does a Tarstone not appear for my Weapon, Sidearm, or slot?

The equipment must support that Tarstone’s type. Check whether you are editing a Support, Combat, Infusion, or Ability slot, then try another compatible Weapon or Sidearm if the stone remains unavailable.

What if Resolve costs or upgrade values differ after a patch?

Use the current in-game tooltip and Tarforge screen for exact calculations. Resolve costs, XP thresholds, Coin costs, Tarcore requirements, hit counts, and level scaling can change while the Tarstone’s core function remains recognizable.

Should I upgrade Ability or Support Tarstones first?

Prioritize the stone that affects the greatest share of your fights. A passive Support stone is the steadier early investment, but an Ability stone should go first when your build generates enough Resolve to use it consistently and its attack solves a recurring range, damage, or crowd-control problem.

How to use this Tarstone reference

Use the comparison tables to identify the Tarstone you own, then check its effect against your current weapon, sidearm, or combat plan before spending resources.

Complete reference: Resolve-consuming sidearm effects

Tarstone	Confirmed effect wording
Infested Stone	Consumes Resolve to fire a clinging projectile that triggers a massive explosion after a brief delay.
Strange Remnant	Consumes Resolve to unleash a stream of projectiles that chain between multiple targets.