Sephiria Mysterious Twig: How to Avoid the Anvil Bug and Use It Safely

Learn how the Mysterious Twig weapon works in Sephiria, why it can block the Anvil in Mole Stronghold, and how to use it without soft-locking your run.

Overview

The Sephiria Mysterious Twig is a weapon that can cause a specific progression problem in Mole Stronghold. According to the official 0.12.0 update notes from TEAM HORAY, entering Mole Stronghold with the Mysterious Twig equipped could prevent the Anvil from appearing in that stage. This bug was fixed in that same update, but understanding how it works can still help you avoid similar issues and recover if you encounter an older version or a lingering edge case.

What you need to know up front: If you are playing on the current version of Sephiria (0.12.0 or later), the bug is patched. If you are on an older build or are experiencing the issue anyway, unequipping the Mysterious Twig before entering Mole Stronghold is the reliable workaround.

What Is the Mysterious Twig?

The Mysterious Twig is a weapon in Sephiria. The official patch notes reference it under the "Weapons" section, confirming it exists as a distinct weapon with its own behavior. Beyond the bug fix note, the official source does not describe its attack pattern, stats, or upgrade path.

Requirements

Before you plan a run around the Mysterious Twig, confirm the following:

Game version: You are running Sephiria 0.12.0 or later (the update that fixed the Anvil bug).
Weapon unlocked: You have obtained the Mysterious Twig through normal gameplay.
Mole Stronghold access: You have reached the stage where the Anvil is supposed to appear.

If you are playing on an Early Access build from before May 2026, the bug may still be present.

Steps: Using the Mysterious Twig Without Losing the Anvil

Follow this sequence to avoid the Anvil issue and recover if something goes wrong.

Step 1: Check Your Game Version

Open the main menu or pause screen and confirm your client version. The 0.12.0 update notes state that the bug was fixed in that release. If your version is 0.12.0 or newer, you can proceed normally.

Step 2: Unequip Before Entering Mole Stronghold (If on an Older Build)

If you are on a version older than 0.12.0, swap the Mysterious Twig for another weapon before you enter Mole Stronghold. The patch note specifically says the bug occurred when entering the stage with the weapon equipped.

Step 3: Enter Mole Stronghold and Check for the Anvil

After entering the stage, look for the Anvil. If it appears, the bug is not affecting your run. If it does not appear, you have hit the bug.

Step 4: Recover from a Missing Anvil

If the Anvil fails to appear:

Do not progress further into the stage until you confirm whether the Anvil is required for your current objective.
Return to town by ending the run if the Anvil is mandatory for progression.
Unequip the Mysterious Twig before your next attempt.
Re-enter Mole Stronghold and verify the Anvil spawns.

If you are on a patched version and the Anvil still does not appear, this may be a different bug. Check the official Steam community hub or Discord for recent reports.

Recommended Setup

For progression: Use the Mysterious Twig in stages other than Mole Stronghold to avoid any risk.
For testing: If you want to confirm whether your build has the bug, enter Mole Stronghold once with the weapon equipped on a run where losing the Anvil is acceptable.
For multiplayer: Coordinate with your party before entering Mole Stronghold. If one player has the weapon equipped, unequip it to be safe.

Common Mistakes

Ignoring the version number. The bug is fixed in 0.12.0, but if you are on an older build, the workaround still matters.
Assuming the Anvil will appear anyway. The patch note confirms the Anvil could be prevented entirely, so do not rely on luck.
Progressing past the missing Anvil. If the Anvil is tied to a quest or upgrade, continuing may waste time or force a restart.
Forgetting to re-equip after the stage. If you swapped weapons just for Mole Stronghold, remember to switch back if the Mysterious Twig is part of your build.

Advanced Tips

Use the Mysterious Twig in the Comprehensive Training Grounds. The 0.11.5 update added a training area where you can test unlocked weapons without risking a run. This is a safe place to learn the weapon's behavior.
Pair the Mysterious Twig with the Mystic Pot. The Mystic Pot (changed in update 1.0.19) converts artifacts, so you can experiment with artifact synergies alongside the weapon without entering Mole Stronghold.
Check the official patch notes before major updates. TEAM HORAY posts detailed patch notes on the Steam Community hub. The 0.12.0 note is the only official source that mentions the Mysterious Twig bug, so future changes may affect the weapon again.

What Could Not Be Verified

The official patch notes do not describe the Mysterious Twig's attack pattern, damage values, or upgrade path. If you need those details, check the in-game weapon tooltip or the community wiki. The exact conditions that triggered the Anvil bug (beyond entering Mole Stronghold with the weapon equipped) are also not documented in the official source.