The Viletongue Hedron is an Infusion Tarstone you get by cleansing the Castigator’s Keep Beacon in the Ruins of Mammon and defeating the mini-boss Viletongue Batushka — it drops once per playthrough with no alternate source.
If you have been sweeping the open ruins of Mammon hoping this Tarstone shakes loose from a random chest, stop — it lives behind exactly one door. The Viletongue Hedron is tied to a single beacon dungeon, dropped by a single mini-boss, and the run to it is short and mostly linear. Here is the quickest way in, what the Tarstone actually does to your Sidearm, and how to push it to its permanent level.
- What the Viletongue Hedron is and where it drops
- How to get the Viletongue Hedron in Mortal Shell 2
- The Viletongue Batushka fight and its inverted controls
- Viletongue Hedron effects and Resolve cost
- Upgrading the Viletongue Hedron at the Tarforge
- Best Sidearm pairings and where to go next
- Frequently Asked Questions
What the Viletongue Hedron is and where it drops
| Detail | Info |
|---|---|
| Type | Infusion Tarstone |
| Region | Ruins of Mammon |
| Source | Defeat Viletongue Batushka |
| Where | Cleanse Castigator’s Keep Beacon → Viletongue’s Domain |
| Availability | Once per playthrough |
The Viletongue Hedron is an Infusion Tarstone — it slots into a Sidearm rather than a primary weapon and coats your shots with the Bloodcurse status. Its one and only source is the mini-boss at the bottom of the Castigator’s Keep Beacon, sitting in the center of the Ruins of Mammon. There is no random drop, no vendor, and no second copy later in the game, so the whole task is really just “get down there and win one fight.”
How to get the Viletongue Hedron in Mortal Shell 2
Cleanse the Castigator’s Keep Beacon, drop into Viletongue’s Domain, and beat the mini-boss waiting at the end of the linear path.
STEP 1/4
Cleanse the Castigator’s Keep Beacon
Reach the beacon at the top of the central Castigator’s Keep ruins and cleanse it to drop into Viletongue’s Domain.
STEP 2/4
Head inside and skip the first chest
Follow the corridor in — the first chest on the altar holds only gold, so grab it or leave it and keep moving to the elevator down.
STEP 3/4
Drink from the table in the ritual room
Approach the candle-lit table in the room with the locked gate; the prompt reads Drink Strange Concoction?, and choosing Yes immediately starts the boss fight.
STEP 4/4
Beat the mini-boss and claim the Hedron
Take the mini-boss down to receive the Sage’s Gate Lever and your prize, the Viletongue Hedron Tarstone.
Sprint past most of Viletongue’s Domain and only fight the enemies that hard-block a door or ledge — community runs show this holds on most builds, though enemy leash ranges aren’t spelled out in the patch notes.
Video help
The Viletongue Batushka fight and its inverted controls
Drinking the Strange Concoction does two things at once: it summons Viletongue Batushka, and it inverts your movement controls for the whole fight. Hold back to move forward, push forward to back away — that reversal is the single thing that catches players off guard, so give yourself a beat to recalibrate before you commit to a dodge or a swing.
Key Batushka is a mini-boss, not the beacon’s final threat, and it goes down without much drama once you have the movement sorted. Both the Sage’s Gate Lever and the Viletongue Hedron drop the instant it falls, so the Tarstone is yours the moment the health bar empties.
Viletongue Hedron effects and Resolve cost
| Level | Effect |
|---|---|
| Lv. 1 | Infusion lasts for 4 shots |
| Lv. 2 | Infusion lasts for 8 shots |
| Lv. 3 | Infusion is permanent |
Once equipped to a Sidearm, the Hedron spends 20 Resolve to infuse your next shots with Bloodcurse. Each activation always costs the same 20 Resolve; what scales with the Tarstone’s level is how long that infusion lasts before you have to pay again. Bloodcurse itself builds stacks on whatever you’re hitting and then detonates for heavy damage once enough of them land, which is why permanent uptime at max level is such a jump in practice.
Upgrading the Viletongue Hedron at the Tarforge
You can’t level any Tarstone until you unlock the deeper upgrade tier at the Tarforge in Marrow Keep, and that means finding the Etching Needle first. It’s looted from a bone chest just before the Magdalena, the Lady of the Woods boss fight — when you spot Ruk past the bridge, drop through the opening and turn right before the tunnel to reach the small alcove with the chest.
Hand the Etching Needle to Franz to expand the Tarforge’s options, then keep the Viletongue Hedron equipped and rack up kills to fill its XP bar. When it’s full, return to Franz and pay Coin to push it up a level — repeat until you hit the permanent Lv. 3 infusion.
Best Sidearm pairings and where to go next
The Hedron shines brightest on the Cursed Child, which turns each Bloodcurse-infused shot into a high-stack projectile for the flat 20 Resolve — an ideal home for a status-first build. From there, the obvious combo is the Accursed Stone, a Curse infusion you cleanse from the Abandoned Outpost Beacon; running Bloodcurse and Curse together stacks two damage-over-time layers on the same target for a genuine status build rather than a one-note ranged option.
If this Tarstone was your goal, the next targets pick themselves: max the Hedron to its permanent tier, grab the Accursed Stone for the paired Curse infusion, and branch into other Infusion Tarstones to cover more status types on your loadout.
Related Mortal Shell 2 guides
Frequently Asked Questions
Is the Hedron mine the moment the boss dies, or do I have to finish clearing the beacon?
It’s yours the instant Viletongue Batushka falls — the Tarstone lands in your inventory alongside the Sage’s Gate Lever right then. Fitting that lever to the nearby gate and cleansing the corruption to collect the Ovum only closes out the dungeon; neither step is required to keep the Hedron, so you can walk away with it and finish the beacon whenever you like.
Can I get more than one Viletongue Hedron in a single playthrough?
No. It’s a one-time drop from Viletongue Batushka, and clearing the beacon’s corruption afterward does not spit out a second copy. There’s no alternate source anywhere else in the region, so a single run through Castigator’s Keep is all you get per playthrough.
Which Sidearms can actually equip the Viletongue Hedron?
Only two: the Cursed Child and the Naylshotte. It won’t slot into any primary weapon or into any other Sidearm, so if you want to run Bloodcurse infusions you’ll need one of those two in hand.
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