Hi.
So in all the story of how Arthas becomes corrupted then becomes the Lich king.
What makes this happen? who is it that corrupts Arthas because he is the lich king so its not like the lich king convinced arthas to become the lich king?
Also it would appear from the end WOTLK cutscene that just putting the helmet on makes you the lich king?
Can anyone clear this up please?