Pirate's Chart Quest

This is a Rare Exclusive item used to start a 20-cap fight on Valkurm Dunes.

You get this from the Inside the Belly quest from Zaldon.

Possible rewards for finishing this 20-cap 3-man fight are:

Mercurial Kris (very very rarely drops)

Albatross Ring ( exclusive ring that helps with fishing time, 180 charges )

and various other junk, including

Fuscina