Swamp Thing (1982)

Dr. Alec Holland, hidden away in the depths of a murky swamp, is trying to create a new species - a combination of animal and plant capable of adapting and thriving in the harshest conditions. Unfortunately he becomes subject of his own creation and is transformed . . . Arcane, desperate for the formula attempts to capture the Swamp Thing. An explosive chase ensues that ultimately ends with a confrontation between Holland and a changed Arcane . . .