THEY ALL DIE!!!just kidding.they become the elements they control and defeat phobos army.It's better if Du see it for your self. The last ep : link and the Sekunde last ep : link
To defeat Cedric the five must go into their elemental stage and almost lose their sanity. But they come back and Will narrates how Rathor turned good, how Cassidy goes under a new name, Mira and is is Cassdiy's long Lost twin sister
So, going from the Halloween episode - W is for W.i.t.c.h -
After working along side a truce with Phobos, Nerissa was sucked into the seal, and Phobos now reclaimed it, except he doesn't want to give it to the guardians. But then Cedric swallowed Phobos, thus giving him all the powers of the seal. From inside the seal, Halinor and Elyon worked together to communicate with the girls, and in the final battle taught them how to become one with their element and dragon - the absolute zenith power. THE END!!!
