Swamp Thing. Poison Ivy is pretty much just a human who can control and mutate plants. Swamp Thing is the soul of a man living in a bunch of swamp matter and plants amassed together. He's also supernatural, where poison ivy is just biological. read more
To me it seems Swamp Thing would be her dream man. Maybe he can help set her on the right path. read more
Swamp thing total and utter curbstomp. Everything Ivy can do Swamp Thing can do better up to Godlike levels. read more