I'd like to suggest a Lore skill. It would represent the characters understanding of the world of Arcadia.

It would imagine its role as:
helping the player identify named artifacts
predicting creatures' stats (basically contributing to the monster memory even before engaging a specific creature)
helping converse respectfully with other races (through an understanding of their culture).

The skill could be trained by reading books of lore and by speaking with a culturally diverse range of peoples.