Suggested by Sonic Metamorpho may not seem like the most deadly of foes in the beginning, but when you think about it his powers are really handy. He can turn into whatever element he wants and there are many elements that can be deadly within moments of exposure. Count Vertigo is good at hypnosis and has a few decent abilities like flight and such, but that won’t be enough here. Metamorpho was able to give a fight to Superman after all, that’s not easy by any stretch of the imagination. He’ll very quickly take Vertigo out with a steel punch. Metamorpho wins.