When you kill a raid captain for the first time you unlock the achievement, Voluntary Exile, which its description lists, "Kill a raid captain. Maybe consider staying away from Villages for the time being..."

This statement is now incorrect with the new update making so the raid captains drop a Ominous Potion which now leads the the fact of staying away from Villages being wrong. It should possibly be changed to, "Kill a raid captain. You shouldn't use that potion near a village or trail chambers (or refer to trail chambers as "another place" as achievement progression allows the trail chambers to be hidden until later.)"