User blog comment:Broman178/Merlin's ability to sense magical objects./@comment-75.13.14.134-20120810200327/@comment-4135736-20120810213513

I think the same, Merlin's ability to sense magical object only activates around powerful magic but in The Wicked Day, Morgana's enchantment on that pendant was really powerful if it could backfire Merlin's healing enchantment and yet he couldn't sense it.