A Serpent-Image

 is a Sunless Sea Explore Random Event.

Trigger conditions
 can be triggered in Venderbight by doing the following:

Event description
“Here!” a zailor shouts. There's something nestled in the mossy crook of a grey-leafed tree. A wooden serpent, lacquered with black, red and yellow. Its eyes are garnet flakes. “That'd fetch a good price at the Bazaar,” the zailor observes. “But it has a cursy look,” points out another.