Guild master had Travonos family killed off in hopes of erasing the last bit a humanity he had left. But I guess he made a deal with soul swappers in an effort to stay human Abit longer I guess?
I have the distinct feeling that to "complete" this scenario, he'll have to kill himself.
Because, he is ultimately what lead to his family's death, he himself is part of the clear conditions.
Yeah, my guess is he kills the guild master and then himself. Or he just dies as a result of his skills and the Guild Master dodging/surviving, leading to a technical “clear”, since he is the cause.