Even though most of the forth season has been running a little slow plot-wise, these last two episodes (episodes 23 and 24) were no disappointment if you were looking for action and epic battles! Bloom vs Nebula will definitely go down in WInx history as one of the greatest battles ever, closly followed by the more recent Specialists vs the Duman Demon.
Nabu defeated Duman's demon form in his last bout of glory. I suppose the writers gave this to him because he died later in the episode. I didn't believe it at first, but after awhile a feeling of permanence settled over it. As most of us probably suspected (I know I did) the Wizards had never turned into "good guys". Turns out they knew the Winx were really gullible and fooled them, costing Nabu his life.
But why would they do this? Is it permanent? He had a chance, with that one gift, but the Wizards made a point of wasting it on a wilted flower.
Well, whether our Nabu's dead or not, the events of the last episode caused Layla to leave the Winx and go with the Earth fairies to get her revenge...