I finally got the Sorcerer! The last three rounds were more difficult. 21 loss in total.
Good luck to everyone who is still fighting!
1. Cosmic 1 < Aether 11 mB
2. Island 1 < Lollipop 10 Bb (lost Rainbow Sentinel 11)
3. Armor 1 < Ruby 10 bM (lost Atlas 10)
4. Fuzzy 2 < Ruby 10 Mm (lost Splatter 13)
5. Knight 2 < Clown 10 B
6. Healer 3 < Rainbow Sentinel 11 mbB (lost Comic 10)
7. Mummy 3 < Divine 10 mbM
8. Illusion 5 < Rainbow Sentinel 11 mB
9. Headless 6 < Divine 10 M
10. Familiar 6 < Castle 9 bM (lost Landworm 11)
11. Druid 6 < Rainbow Sentinel 11 bM
12. Chess 8 < Aether 11 M
13. Medusa 8 < Warrior princess 12 B, bbB, I had to fight twice (lost Ruby 10)
14. Archon 9 < Divine 10 bmB
15. Tusker 12 < Rainbow Sentinel 11 bmB (lost Aether 11, Clown 10)
16. Pinata 9 < Warrior princess 12 B
17. Leviathan 10 < Marshmallow 11 bM (lost Lollipop 10)
18. Owl 10 < Warrior princess 13 bM
19. Naga 12 < Goblin 9 bM (lost Archangel 10)
20. Battlecaster 14 < Infinity 11 Mm (lost Diamond 15)
21. Hypnotic 12 < Warrior princess 13 B
22. Lorekeeper 14 < Warrior princess 13 bmB
23. Mischief 14 < Divine 10 Mm (lost Warrior princess 13)
24. Diamond prism 17 < Diamond 15 bM
25. Black knight 20 < Diamond 15 mB (lost Diamond 15)
26. Avatar 18 < Warrior princess 13 bmB
27. Behemoth 18 < Divine 10 mB
28. Spirit 20 < Morning Glory 10 bM (lost Aether 11, Lollipop 10)
29. Dream 20 < Rapunzel 10 Mm (lost Aether 11, Lollipop 10, Crystal 9)
30. Sorcerer 20 < Warrior Princess 13 B (lost Rainbow Sentinel 11, Lollipop 10, Nouveau 9)