*Maybe* zombies and the like totally obtain their unholy energies from
an ancient hidden but well connected (i.e. known by many cults and
patheons) Shortworld. They are not Chaos nor Darkness and are not
connected to the Infinity.
Undead are created via an ancient myth that many gods (or worshipperso
of those gods) discovered venturing by chance or by will in that
specific ancient Shortworld of Living Dead.
Ciao,
Gian