Board Thread:Speculation House/@comment-33287020-20180410162106/@comment-1292715-20180411004833

Skyyyyyyyyyy wrote: Another thought I had regarding this is that maybe Ozpin is sort of a master key for all the vaults, seeing as how the maiden power did come from him. Perhaps a security measure if maidens go rogue or a vault location is about to be attacked. It seems like a power he'd keep to himself, considering the implications would likely unnerve his organization. Him being able to waltz in and take any relic he desires at any point in time. Kinda defeats the maiden thing.

But if Ozpin was able to open the vaults himself, then they wouldn't have needed to plan to raid the Branwen tribe to retrieve the spring maiden in order to 'secure the Relic of Knowledge'. They could've just taken the relic and left long before the attack on haven.