I'm losing my mind here. Currently unable to update my system because when I run Syyu (or similar) I get a failure to retrieve files from mirror.f4st.host and omniverse.artixlinux.org despite neither of these mirrors appearing anywhere in pacman.conf or the mirrorlist. Where on earth could the reference to either of these be located if not in those two files?
Post your mirrorlist, pacman.conf and actual output of pacman -Syu.