Flame warriors

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Across
  1. 3. a sign
  2. 4. overthrow
  3. 6. containing facts
  4. 7. enemy
  5. 9. that works well
  6. 12. without a clue
  7. 13. attack
  8. 15. add
  9. 16. argument
  10. 18. excite
Down
  1. 1. where the battle takes place
  2. 2. answer
  3. 3. unimportant
  4. 5. stagger
  5. 8. citizens of the net
  6. 10. deep
  7. 11. state of not being sure of oneself
  8. 14. a nuance
  9. 17. trap