Where the Known Meets the Unknowable.
This image is mostly only for me, but it should work for others too.
From Silverblue/Kinoite/any:
# Aster NVIDIA (KDE Plasma)
sudo rpm-ostree rebase ostree-unverified-registry:ghcr.io/alxhr0/horizon-aster-nvidia:latest
# Aster (KDE Plasma)
sudo rpm-ostree rebase ostree-unverified-registry:ghcr.io/alxhr0/horizon-aster:latest
# Arcturus NVIDIA (GNOME)
sudo rpm-ostree rebase ostree-unverified-registry:ghcr.io/alxhr0/horizon-arcturus-nvidia:latest
# Arcturus (GNOME)
sudo rpm-ostree rebase ostree-unverified-registry:ghcr.io/alxhr0/horizon-arcturus:latest