Who is the Justice League arch enemy?

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Tags

1. #superman
2. #aquaman
3. #grodd
4. #doppelganger
5. #strong
6. #sworn
7. #flash
8. #gorilla
9. #intelligent
10. #plunderer
11. #black
12. #luthor
13. #psychic
14. #bizarro
15. #enemy
16. #twisted
17. #resourceful
18. #super
19. #manta
20. #oceanic