Your fiendish transformation is complete, and
you are reborn. You must choose a new name for
yourself, which becomes your true name. You
receive a talisman of brimstone and brass with
your true name inscribed in infernal on it. A
creature within 10 feet of you that knows your
true name, can use an action and speak your true
name in an attempt to bind you to their will. If
they do, you must make a DC 20 Wisdom saving
throw. On a failed save, you become charmed by
the creature, and must complete all commands
they issue to you to the best of your ability. You
remain charmed for 8 hours. If the creature that
bound you dies, this effect ends.