Yup, and best have 2 or more of them since after imbuing will have dur slowly or quickly go down, depending on use. Not really sure, but "sparks" may have a similar effect to splinter in terms of decay of durability, but to a lesser extent? Definitely not documented. Dur seems to go down more than my DA's, from 255 way down to the 120's with 1-2 sessions. I could be wrong though (I hope).