Some nerf to blood-sucking items would be in order
Here's the version of the artifact I received when I got it originally:
jet-black dagger (+6, 4d4+6) {Dx+9}
Here's how it looks after a while:
jet-black dagger (+6, 4d4+22) [+10, +27] {Dx+20}
While the PV was unnaturally boosted due to the wrong stat incease bug (already reported), I think flat +10 stat increase that doesn't go away seems a bit too powerful.
I precrowned as LN with it and didn't get my alignment change for all the draining I did, so there's no incentive to not use them as far as I can see.
I've notice that the increases start to become rarer which is a fair mechanic. However, I'm still getting occasional increases at this point.
I think some nerf might be in order:
1) Either they should decay over time
2) Or it should have detrimental effect on alignment, stats or something else.
EDIT: It also seems that the dagger is getting PV/DV increases for no reason as it's not supposed to get them (GID doesn't have the messages for block/parry).