Disclaimer

This fanfic is about the worlds of School for Good And Evil, Keeper of the Lost Cities, Percy Jackson and the Olympians, Heroes of Olympus, Kane chronicles, Magnus chase and the gods of Asgard, Septimus Heap series, Land of stories, Skulduggery pleasant series, The chronicles of Narnia, Wings of fire, Spirit animals, Inheritance cycle, Harry Potter, Trials of Apollo, Morrigan Crow series, Artemis Fowl series
The heroes of all of these worlds/dimensions have to get together to fight an enemy of all of them.
The one thing they have in common is that they all realise at least one of each of their enemies have been villianised by circumstance