The latest trailer for Atlus' upcoming 3DS release of Etrian Odyssey 2 Untold: The Fafnir Knight shows how players can trade Grimoire Stones in order to gain new skills. Grimoires can be traded with various NPCs, or be given to an NPC called Regina who will trade it for the player while they are out adventuring. The game also allows potential trading of Grimoires when using the StreetPass and QR code features.
Etrian Odyssey 2 Untold: The Fafnir Knight is a remake of Etrian Odyssey II: Heroes of Lagaard. Like the previous Untold game, it features both a new story mode with pre-made characters and a classic Etrian Odyssey mode where players can choose their own party. The game is due out in North America on August 4, 2015 and in Europe on February 12, 2016.