Sorry for delay was away that time around.
As for infusion of weapons, I honestly not sure how to give a good solid example. >.>
Seraph kinda, but that incorporated
them using science to an extent to bind demons to a weapon? Though the demons I believe were still actually vampires, were they not? Cause they were pretty much kidnapping vampires and experimenting on them I believe to make such weapons in the first place. Unless they turned to demons, I dunno, lot of stuff in that anime never made much sense.
Can't relate to Outlaw Star cause I never really got into it to watch it.
Kaberni(sp) kinda again, though
again they simply infused such through the blood to allow the sword to cut through anything. It was also shown others must of had similar idea later in anime(never read manga) since one of guys was carrying a similar black/red color sword
Again on magic spectrum, Enchantment at a base is nothing special; unless people specialize in other fields of magic which again is mostly limited in itself(unless demon.) The most one can succeed at is taking other coexisting natural elements and implying them with an object to enhance or lessen its capabilities. The way I see it, it takes that knowledge of how that magic properly works to fully enhance something into it; so on the most base of levels, enchanting right now falls to a fundamental knowledge of properties of an item and how to manipulate its present existing element(s.) The same applies with combining them with other objects, such as a blade with source of firestones or something to make an enchanted fireblade.