You lose access to all other "left-hand weapons" if you have the Shadowhand. But as you say, who cares
. I loved the Shovel but the Shadowhand Claw has the edge on it
You'll find that all artefacts gained from defeated Beasts will appear again on subsequent attempts. I wondered if you could build up a huge Fury level continually playing through Fortress and/or Dragon Revenge. However, I seem to remember that you gain the extra level for the duration of the chapter but it disappears as you move on. Please double-check me on that but I think that's what happened.
Cheers