Celebrimbor's Secret is the fifth Adventure Pack in The Ring-maker cycle for The Lord of the Rings: The Card Game. Its sixty new cards introduce a new scenario in which Middle-earths heroes must scour the ruins of Ost-in-Edhil for a secret forge before its discovered by Orcs from Mordor. Celebrimbor's Secret also introduces a powerful new hero Galadriel, the Lady of Lothlórien player cards for each sphere (three copies of each) that enhance the Silvan and Noble traits, as well as the Doomed X mechanic.