N will not likely make the next rotation. I don't recommend buying 4 N's as you are new to the game and this season is already halfway done. N is a great card; however, there are some pretty good replacements you could get that can be used after the rotation. (Assuming the rotation is XY-On) Shauna, Professor Birch's Observations, VS Seeker and Sycamore all are good choices when the rotation comes.