Magic Winx is the first transformation that the Winx achieved. In nick it is called Magic Charmix.
In the original series of Winx Club, the Winx had acquired Magic Winx. Everyone of the Winx except Bloom alredy earned it at the beginning of the series.
In Nick version appears with a new transformation sequence for all girls. However the appearance and the requirement to achieve this transformation are the same as in the original version.