i agree with the people saying he's doing this to be with lerajie/"rewrite" the book. he foresaw the events of the book in a prophecy (or maybe lived it and did some time travel magic or something) and saw the miserable ending that was in store for all of them if lerajie and the king get together. i don't know if he's helping ginger with an actual desire to help her or just as a way to protect lerajie from the fate of being killed by izana. he's a little sus.