Slytherin Appreciation Day!

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Across
  1. 3. The Heirloom of Slytherin was a _____.
  2. 4. Slytherin Head of House during Harry Potter's time at Hogwarts.
  3. 7. The Common Room is located in the ______.
  4. 8. The monster in the Chamber of Secrets.
  5. 9. Slytherin's main rivals in the Harry Potter series.
Down
  1. 1. The Slytherin House ghost.
  2. 2. This famous wizard was a Slytherin.
  3. 4. This animal is on the Slytherin badge.
  4. 5. Typical Slytherin trait.
  5. 6. ______ Slytherin founded the House.