I haven't even come across any stone knights. I realized at some point that I never opened that sealed door near the Parish, so I went and bought the seal from Andre and then I quit the game because I was getting frustrated. I was thinking the Butterfly would be past that door.
Nope. Sif and the Forest Hunters Covenant are behind that door. I'm assuming you took the ladder route from the Hydra to get to sif. That door is just an easier way to there. However the road to moonlight butterfly is to the right of that sealed door, behind a fog gate.
