Hi!
This could be a spoiler because it concerns one-off quest rewards. If you've read this far you aren't bothered, so I'll continue...
...Fairly recently I got the quest from Dawnguard to retrieve the Dawnguard Rune Axe. I now have the thing and have been testing it out. I think I've got an idea of how it works but I have no idea of how much power it's getting: There seems to be no way of telling how potent it is.
First off, it seems to be getting stronger with every un-dead that I kill with it. I say this because the flash of blue light surrounding vampires when I hit them appears to be getting more intense and I think they are getting easier to kill. It does not affect un-dead. I have yet to find out if it is effective against draugrs, skeletons and the like because I've killed most of the bu***rs and I've been wandering around hoping they've re-spawned somewhere.
Anyhow, to get back to the point, I'd like to know for certain that it is improving with each kill and if so, by how much.
The weapon stats always remain the same with each un-dead killed: same damage (219*), same value (495*), same weight. I have checked active effects with the weapon sheathed and drawn and they show nothing that I didn't already have. I've checked powers with the same result. I want to improve its efficacy but don't want to do Dawnguard quests forever trying to improve a weapon that has maxed out.
Is there any way to find out what magika power it has at any one time? It's frustrating because with any other enchanted weapon you can tell what it does exactly: 'causes 50 points of stamina damage' etc. With sunhallowed arrows you can gauge the effect and see it but you know that it won't get more potent: they are what they are. It would be nice, after sweating over killing a few master vampires if I knew its sun-damage had gone from 50 to 60, or whatever.
One of you will know the answer, so don't be shy!
* weapon improved with four smithing items worn at 31% improvement and fortify smithing potion at 148%