I was listening to some of the audio files and came across this. Most likely cut content since I couldn't find any reference to this dialogue anywhere else. There could be more as well but I still have still have a bunch of files to listen to.
The dialogue seems to indicate he would give you a whetstone knife. I'm guessing at some point in developement, you got the ability to change your ashes of war from him rather than finding the knife in the Gatefront Ruins.
He also has some dialogue for creating the god-slaying weapon (maybe when you used an ancient dragon smithing stone?) and for fulfilling his wish (most likely after defeating the Elden Beast). Enjoy the dialogue :)
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