Boredom killa

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Across
  1. 3. A tube of mirrors creating endless symmetrical patterns
  2. 7. A master of disguise that shifts its colors
  3. 9. Lasting for a remarkably brief time
  4. 12. A bittersweet longing for the past
  5. 13. A dramatic speech delivered to oneself
  6. 14. An optical illusion often seen in hot deserts
Down
  1. 1. A dark shape seen against a brighter background
  2. 2. A deceptive trap that pulls you deeper when you struggle
  3. 4. A brief appearance by a famous person in a film
  4. 5. When one celestial body blocks the light of another
  5. 6. Open to more than one interpretation
  6. 8. A complex maze with only one true path
  7. 10. A statement that contradicts itself yet might be true
  8. 11. A swinging weight that regulates a grandfather clock