My new favorite passtime since the game's release has been to convince every streamer who allows viewers to join to let me lead them to the path that unlocks this, and watch them struggle with it, only for them to finally win that level and find out that WASN'T what I was tricking them into playing, but instead I was leading them to this. Its so amazing to see the whole emotional spectrum from someone in just 3 levels. Its evil but its so entertaining.
I stood up there for a good couple of minutes, not knowing where I was supposed to go. The swing was a fluke, but boy howdy was I bitter when I died at the end.
In the end, Seath was far easier to beat when I wasn't trying to cut off the tail. Moving forward, I decided that my first playthrough aim will just be to beat the bosses rather than go for secret weapons I'll never use.