Exactly. I mean, how easy would it have been to steal all of the white oak ash and pour it into the ocean? The daggers would be useless, then.

The period that Klaus was under the Hunter's Curse has always been the most bizarre plot hole for me - like, he wasn't even lucid in 1114, how could he have kept track of the daggers? What could he have done to stop them from getting rid of them? It wasn't like it was a brief window of time, he was incapacitated for over half a century - it would have been the easiest opportunity to get rid of the daggers (he wasn't hiding them, and it's not like he would have been able to put up a fight), and they never even tried to do anything?