Use your key
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From: An Intricate Lock
The key's teeth splay out in all directions – do they move when you're not quite looking at them? This seems like the lock that it fits.
Unlocked with 
1 x Intriguing Key
Success
Click
The key turns more times than would seem strictly necessary. But the door swings open.
You've lost 1 x Intriguing Key
You've gained 2 x The Burglar's Progress
