Hui hui hui

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Across
  1. 3. Super soldier
  2. 8. Skilled assassin
  3. 9. Synthetic android Avenger
  4. 11. Mystic sorcerer
  5. 13. Reality-altering witch
  6. 14. Wakandan king
  7. 18. Cosmic-powered hero
  8. 19. Green powerhouse
  9. 20. God of thunder
Down
  1. 1. Friendly superhero
  2. 2. Tree-like Guardian
  3. 4. Size-shifting hero
  4. 5. Adamantium-clawed mutant
  5. 6. Size-changing Avenger
  6. 7. Brainwashed assassin
  7. 10. Billionaire inventor
  8. 12. Avian-powered hero
  9. 15. Master spy
  10. 16. Leader of Guardians
  11. 17. Master archer