Poneglyph

Poneglyphs are small structures that spawn in the mod. They spawn quite rarely, and function to copy inscriptions onto a piece of paper. The inscriptions cannot be read unless they are decrypted. You can decrypt a inscription by giving it to a librarian villager, and decrypted inscriptions can be used to receive challenges that give you bounty. Encrypted inscriptions can also be put into a crafting table to make a vivre card, which binds to the player who holds it.

To copy an inscription, walk up to a Poneglyph and use a piece of paper on it. You can only copy an inscription once.

There is currently (to my knowledge) only three challenge given by this, and that is the "Marine 153rd Branch Challenge: Morgan", which has you defeat Axe-hand Morgan, and "Kreig Pirates Challenge: Gin" and "Kreig Pirates Challenge: Don Kreig" which have you defeat the respective individual.

NOTE: You don't have to use the Encrypted inscriptions to make a vivre card you can also make them out of normal paper.