Board Thread:General Discussion/@comment-35106778-20180326164605/@comment-31829564-20180326174704

From what I understand, both sons of the FSM have both elements, it’s just they are more naturally inclined for one or the other. They can use the other one if they unlock their true potential, I think. Garmadon has done this, but Wu still hasn’t. I always thought it was him thinking he (indirectly) made Garmadon evil stopping him, but it may not be.