An anti-serum developed to combat the Devil's Breath outbreak after Doctor Octopus released the virus in Times Square. It was developed by Dr. Morgan Michaels and then stolen by Martin Li and obtained by Spider-Man before being stolen again by Doctor Octopus and then subsequently being retrieved by Spider-Man for replication.
- 2 Appearances of GR-27 Antidote
- Minor Appearances of GR-27 Antidote
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- Item Gallery: GR-27 Antidote