Board Thread:Spoilers!/@comment-4637931-20150423001922/@comment-4637931-20150423011914

Well there are other ways other than murder to darken a heart. Look at MM. If what she said is true and the dark spot on her heart wasn't because of her involvement with Cora's murder but also when she kidnapped Maleficent's child and broke her promise to bring it back then she's an example of that murder isn't the only thing that can darknen a heart. Possibly Zelena's strong jealousy towards Regina caused some darkness to her heart as well as her skin turning green. Also she is responsible for Neal's death. She kidnapped a new born baby and almost used it as a magical prop to open a portal. She threatned a little girl and was about to kill her. Who knows what else she could've done? She most likely has been terroizing the people of Oz possibly killing many innocent people there.