A couple years ago I read a good short story that I haven’t been able to find. I only sporadically read Tor, Clarkesworld, or award winning short stories, so it probably had some buzz. I think it was probably written in the last few years.
My memory is fuzzy, but the main character is a woman. There is some sort of important timeless tower around a black hole or something like that. For some reason, people constantly try to bribe or challenge its protector to get something from it. It is filled with riches which he can't appreciate. He also has a gun that can shoot anywhere in the universe. I think she comes to gamble with him or challenge him for whatever is in the tower.