Board Thread:General Discussion/@comment-24589671-20140329051413/@comment-5655661-20140409222157

If we go with the predestination theory, attempt to change the present by going to the past is what actually made the present the way it is. So maybe Zelena already went to the past and changed it but her change resulted in the present we have right now (for example her current version went to the past and died there so it left Regina as the only one who can cast the Curse. If she goes to the past again she will die again so Regina would still be the only one who can cast the Curse). I hope you got what I was talking about :D