Green Lantern / Green Arrow #4

When Green Arrow and Black Canary are confronted by harpies, GA calls Green Lantern for help. GL follows the harpies into a trap laid by The Witch Queen on behalf of her brother Sinestro. Following a lead, GA and BC meet a group of Amazons, who, impressed by Black Canary's fighting skills, explain how in the distant past they were banished to another plane by a wizard, but have been allowed to return by The Witch Queen to make all men pay. With this information, the duo follows the trail to The Witch Queen and rescue Green Lantern from banishment and the grasp of the legendary Medusa.