It says as per the spell, and the spell doesn't have a duration of 'permanent'. Thats good enough for me !
While its true many item descriptions do state durations, most of them come with attached caveats that aren't in the spell descriptions (eg, Boots of Speed limited to 10 rounds as per the spell, however the item can be split up into many uses of shorter durations etc).
With a specific duration lacking, I fail to see any reason to assume the item should be permanent instead of just referencing the base spell. The Scabbard of Keen Edges is a good example of this. It casts keen edge 3/day, but has no duration listed. Why bother with 3 times a day then, when the first use would make your weapon keen permanently, if you followed your above interpretation.
Heck, after the first 2 days of owning the item, you could make the entire party's weapons keen, then you could hire it out and make a huge profit !
While its true many item descriptions do state durations, most of them come with attached caveats that aren't in the spell descriptions (eg, Boots of Speed limited to 10 rounds as per the spell, however the item can be split up into many uses of shorter durations etc).
With a specific duration lacking, I fail to see any reason to assume the item should be permanent instead of just referencing the base spell. The Scabbard of Keen Edges is a good example of this. It casts keen edge 3/day, but has no duration listed. Why bother with 3 times a day then, when the first use would make your weapon keen permanently, if you followed your above interpretation.
Heck, after the first 2 days of owning the item, you could make the entire party's weapons keen, then you could hire it out and make a huge profit !
