Thanks for the welcome. I didn't mean that a charged hemalurgic spike would act as a shardblade. What I meant was, could you take an ordinary sword, or really any piece of metal (looking at you ballpoint pen), and use it to tear off someones soul, thus killing them. I was thinking either as a way of taking care of people with healing factors or as a way of making normally non-lethal weapons suddenly lethal. My reference to shardblades was more that shardblades cut the soul and any piece of metal, with the right intent can rip and tear a soul.
Basically the thought was could hemalurgy turn any random metal object into a soul ripping magic weapon with only a little bit of mental gymnastics to justify your intent to make a spike. Like say you're in the middle of a battle and the other guy won't go down. You decide that he needs to die now so you use your spear to cut a small nick on his arm and while you do that you concentrate on making a spike. As you cut the spear absorbs part of his soul, killing him. I wouldn't expect it to make a viable spike but I assume given Ruin's intent that it wouldn't be good for the victim.