“Polarity Chapter Two Drowning”
Dr. Neal Emerson attempts to use his knowledge of magnetics to cure his brother's brain cancer, but when Jessica and Simon attempt to bring him in, the power of Doctor Polaris is unleashed.
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Green Lanterns #20 (2016) is issue #20 of DC's Green Lanterns (2016–2018), with a cover date of June 2017. Written by Sam Humphries and drawn by Eduardo Pansica.
Credits, characters and story details from the Grand Comics Database, CC BY-SA 4.0.