Helm of Devil Command

If you are not a devil, using the helm's dominate
monster property, there is a 15 percent chance
of attracting a narzugon, which arrives on the
back of a nightmare mount in ld4 hours. The
narzugon tries to recover the helm, killing you if
necessary to obtain it. If it gets the helm, the
narzugon tries to deliver it to its infernal master.