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My theory:
Night 1
1. Phagocyte checks Arandor.
2. Antibiotic is blocked or absent.
3. Leukocyte protects Cash.
4. Granulocyte protects Amko.
5. Monocyte protects Tako.
6. Lymphocyte blocks Cash's Night Defense.
7. Alcohol blocks Lizard's Night Defense.
8. Hepatitis checks Lizard.
9. Cholera is blocked or absent.
10. Opium (Vish) kills Cash.
11. Flu kills Tako.
16. Thrombocyte revives Naira.
Night 2
1. Phagocyte is blocked or absent/checks Witch.
2. Antibiotic watches Vegtam.
3. Leukocyte protects Kostyan.
4. Granulocyte protects Cash.
5. Monocyte protects Cash.
6. Lymphocyte blocks Hermit's Night Defense.
7. Alcohol blocks Cash's Night Defense.
8. Hepatitis checks Witch/is blocked or absent.
9. Cholera kills Freyd.
11. Flu (Arandor) kills Kostyan.
12. Heroin (Freyd) kills Khostor.
16. Thrombocyte revives Witch.
Night 3
1. Phagocyte checks Khostor.
2. Antibiotic watches Witch.
3. Leukocyte is blocked or absent/protects Cash.
4. Granulocyte protects Cash/is blocked or absent.
5. Monocyte protects Tako.
6. Lymphocyte blocks Naira's Night Defense.
9. Cholera kills Vegtam.
13. Hepatitis kills Tako.
14. Alcohol (Vegtam) kills Avern.
16. Thrombocyte revives Cash.