What happens when you use polymerization on a Yasuo and a Nami?
You get a Yami http://vignette2.wikia.nocookie.net/yugioh/images/3/3e/Yamiyugiddm.png/revision/latest?cb=20160612073736 ..., I'm sorry http://media.lolusercontent.com/api/embedly/1/image/resize?url=http%3A%2F%2Fi3.kym-cdn.com%2Fphotos%2Fimages%2Fnewsfeed%2F000%2F618%2F545%2Fbfe.gif&key=a45e967db0914c7fb472fd4381e6c85b&width=425&height=800