Swampthing, he has the ability to take over the entire planet he even created a tree upon were the earth rests, he can servive with out his body only to get a new one just by the smallest peace of plant life near by even tabacco in a cigerette, he can connect himself to the planet and controll it, he can make duplicates out of planets, he's gone through hell to save his friend, all kinds of crazy stuff.
Yes, but could Reed possibly come up with some kind of brilliant plan to take him down? I doubt it, but you never know when it comes to Reed...and could Human Torch just burn out any form he took, or burn any duplicates he created? I don't see Swampthing really being able to do a whole lot to take down the F.F. either...I mean, he's powerful as far as plants and stuff like that is concerned, but what could he really do to take down all of the F.F.?