The light in the darkness, the warmth in the cold

Pitch black's main goal was always to make Jack Frost his ally , and to turn him against the guardians , but what if an incident changed all of that and they became more than ally's , what if they had more in common things than they ever imagined? , why are they not killing each other on site ? , and most importantly who is Jack Frost real enemy??

This is not a ship but friendship.

I don't own anything it all belongs to dream works
I only own the plot