Stronger
They say what doesn't kill you makes you stronger. I have come to realize just how true this saying is simply by watching Jack fight Pitch. All I can say is that whatever doesn't kill jack better run away if they have any intention of living. He fights with style and grace, a rhythmic dance so complex Pitch can't keep up. His nightmares are even having trouble touching the winter sprite and his sand doesn't have a chance in hell either. It's beautiful in an odd way.
It's funny, really, how quickly my thoughts on Jack have changed. Just this morning I scoffed at the thought of Jack becoming a Guardian, now I would like nothing more. I have to say I'm proud of him, not only has he refused Pitch's offerings, but he also risked his very existence to try and set Tooth's mini fairies free. That takes guts, and a lot of it.
Oh yes, Jack has become much stronger since '68.