Strong Foot

Exploration Stage: Post Office
From: Mr. Black
Description: During my evening rounds on the fog's edge, I started noticing a suspicious silhouette, clearly not human. Anytime I went to get closer, it dissolved into the fog. But I've found some material evidence. Take a look at this footpring, for example.
Completed: This footprint was left by a huge creature - it's foot has been imprinted in stone! I'm no coward, but I wouldn't want to fight such a monster...