mythological creatures

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Across
  1. 4. bringer of pain and death. servants of Satan
  2. 5. i will leave you a pair of holes
  3. 7. mane of gold and a poison tail
  4. 10. we know now that they narwhal horns
  5. 11. your on fire!
  6. 12. like a Lamassu or an Assyrian
  7. 13. a warning sign of destruction
Down
  1. 1. been destroying boats since 1180
  2. 2. 4 (or more) heads are better than 1
  3. 3. every 29.5 days i show my true power
  4. 4. creatures of wisdom and power... and fire breath
  5. 6. don´t stare me in the eye
  6. 8. hoves and arms
  7. 9. lies in a slumber at R´lyeh