Board Thread:Wiki-Related Discussion/@comment-28081000-20180331170703/@comment-24773320-20180514073921

Actually, according to the Wish Realm Rumplestiltskin (in Homecoming), there is only one entity known as the "Darkness". This is implied when Wish Realm Rumple tells Henry Mills that if Weaver destroys his own Dark One powers, it will also destroy the Wish Realm Rumple's powers as well. This pretty much indicates that they somehow share/embody the same dark power.