Weapons & schematics
Nightfall Serpent Katana
The Nightfall Serpent Katana schematic comes from a locked box in a cave, not a loose pedestal. In the gameplay route, collect a Serpent Key from the harbor seabed, travel from the dock toward the cave near Enmu, and try the box to the right. The creator warns that the working key may differ between players. Once the box opens, check for the named schematic and then inspect a blacksmith's current craft requirements.

On this page
Collect a candidate Serpent Key
The video shows one candidate key but does not establish that its exact spot gives the working key to every player or server. Keep the search flexible.
- Search the underwater floor around Mistfall Harbor.
- Pick up a named Serpent Key and confirm it is in Inventory.
- Return toward the dock before following the Enmu cave route.
Open the box beside the cave
If the key fails, return to the harbor seabed for another candidate. The creator's uncertainty about key matching is why this page does not publish a fixed key number or guaranteed first attempt.
- Follow the dock approach toward the cave near Enmu.
- Look to the right of the cave route for the locked serpent box.
- Try the key, then read the box response and check Inventory for Nightfall Serpent Katana Schematic.
Prepare the katana craft afterward
Opening the box grants access to a schematic. It does not automatically forge a Nightfall Serpent Katana or replace your equipped weapon.
Read the current blacksmith recipe, base blade and material costs before gathering supplies. The source clip documents the key-and-box route, not the complete finished-weapon stat panel.
See the full key-to-box route
Continue your journey
Find more guides in the Slayers 2 Wiki & Database.