Heilung is an experimental folk music band made up of members from Denmark, Norway, and Germany.

See here for what a concert is like: youtube.com/watch?v=h1BsKIP4uYM&si=EnSIkaIECMiOmarE

Also this comment on the YT video: “As an Italian, this makes me feel something between "I am completely mesmerized" and "send 3 legions".”