I always thought it was cute how the Egyptians thought the heart was the seat of thought, emotions, etc. I just sort of combined that with the common idea in fiction that they had alchemical/magical knowledge we didn't, along with my desire to make a sword SCP that doesn't suck. Well, I mean, it sucks, but that's in-universe.
I'm not expecting it to be exceedingly popular, but I'm confident that it's a good piece.
E: I'm aware that this SCP is similar to the Katana of Apparent Invincibility. I'm hoping that they go in different enough directions with it for people to appreciate the former.
E: And I'm going on vacation tomorrow (I should be in bed right now to wake up in time to leave). Interestingly enough, this isn't the first time I've left the morning after posting an article. Anyways, I'll answer critique and make changes a few days from now when I get the chance.