Green Lantern and Doiby use a special radio-like device Alan Scott had developed that is attuned to the mental wavelengths of Grundy himself; Green Lantern calculates the path of Grundy and announces over the radio in JSA HQ where Grundy will strike. When Green Lantern and Grundy meet, Grundy rips a tree out by its roots and smashes it into the Lantern. Green Lantern fights back with his power ring and fists until both men fall into a nearby stream and over a small waterfall.