Quick answer: Speak to the thief after freeing him from his cage in the Smuggler’s Tunnel, and he’ll give you the key. Use it to open the concealed wooden doorway connecting the Smuggler’s Tunnel with the Smuggler’s Treasure Cellar.
The Village of Lu Cellar Key is a key item in Phantom Blade Zero. Its card reads:
“A key pieced together from several iron bars. Besides opening the hidden entrance to the Smuggler’s Tunnel, it seems to have served its owner just as often for picking locks.
The character for “Lu” is engraved on one end, it may be the cellar key to an old house in Village of Lu.”

Where to get the Village of Lu Cellar Key
The key comes from a captured thief, not from a chest. You have to reach his cage, open it, and speak with him.

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The key fits a single wooden door in the Village of Lu. That door is the hidden entrance mentioned on the item card, and it joins the Smuggler’s Tunnel to the Smuggler’s Treasure Cellar.
| Bell | Distance to the door | Height difference |
|---|---|---|
| Smuggler’s Treasure Cellar | About 21 m | Door is about 13 m below |
| Smuggler’s Tunnel Entrance | About 24 m | Door is about 13 m above |
Since the door lies between the two bells, it creates a shortcut from one to the other. The bell locations list shows how each sits within the wider region. At Smuggler’s Treasure Cellar, climb the ladder beside the barred house gate to find the bell, with a small candle offering next to it.

Related keys and areas in the Village of Lu
- Puppet No. 44’s Eye lets you pass through the masked red gate into the Smuggler’s Tunnel. See the guide to unlocking the Smuggler’s Tunnel gate.
- Everything else worth picking up in the region is in the Village of Lu collectibles roundup.
- The Village of Lu interactive map shows the whole area.






