Board Thread:General Discussion/@comment-5621713-20121207092202/@comment-94.145.209.242-20200313225957

Both are born with it but it seems like Merlin is more sensitive to it. In season 3 episode 2 The Tears of Uther Pendragon when Morgana invokes the dead with that staff Merlin instantly feels the power that the staff exudes. And in Season 4, episode 1 The Darkest Hour feels the impact of the veil being opened between the world of the dead and the world of the living. Morgana doesn't seem impacted by it. She is just physically blown backwards. There are also instances were merlin just feels if a place is magical.

I even think that Morgause is more powerful than Morgana became because she also felt the magic of the staff