okay, The Seer Of Dreams , You're going to have to provide an example of an artifact. You're being really vague right now, so...
Let me see if I've got this straight then;
Artifacts are souls of gods, basically, bonded to physical things. These souls have personalities. Some have gone mad from the solitude, others have stayed sane. All are powerful.
Fractured souls have their own abilities, albeit much weaker, and generally lack a personality.
So would I be getting off easy if I said that;
The Brain of the Summer Storm
was a full soul, split into 2 (major) personalities (Raijin/Thor, or at least they would be the most used) as a result of it's madness? EDIT, it's now two souls, mashed into one artifact. ;3 Nick's going to need all the power he can wield to be able to make them bond.
The Shadow thief's Gloves being a small fraction of a thief-god's soul? This is good.
and Hades's Gun being
a fraction of Hades's soul he gives to all Grim Reapers? EDIT, it's now Hades's soul, twisted into the Gunman, takes more shots but can still hurt anything with a soul, and I added some defensive measures. Also a really strong 'curse'. ;3