Harry Potter TCG: Chamber of Secrets

### Harry Potter TCG: Chamber of Secrets The Harry Potter Trading Card Game Chamber of Secrets Expansion (or simply Chamber of Secrets, for short) was the fifth and final set of cards of Harry Potter Trading Card Game, and the fourth expansion to the base set. It was introduced in October 2002 and its 140 cards were based on scenes from the Harry Potter and the Chamber of Secrets book by J. K. Rowling.