Swamp Thing. Volume 3 Trial by fire - Mark Millar

In this collection, a powerful force arrives on Earth from Nightmaster's other-dimensional realm, determined to steal Swamp Thing's newly acquired elemental abilities. Then, in the concluding 6-part "Trial by Fire," the U.S. government sends Jason Woodrue-the man who discovered Swamp Thing's true nature--to navigate the unearthly landscape of the Louisiana bayou in search of the Earth Elemental. But Swamp Thing may be as altered as his environment-and John Constantine and the Phantom Stranger have their own plans for dealing with what he's become. Collects SWAMP THING #161-171.