Here comes the most anticipated segment for comparison of these two characters i.e. Joan Garrick vs Swamp Thing superpowers. Powers and abilities define their strength, both physical and mental. So what will happen if these two super characters engage in a fight? Here you can compare Joan Garrick vs Swamp Thing powers, abilities, weapons and gadgets. So lets check out Joan Garrick Powers and Swamp Thing Powers.Decide who is more powerful!