Ghoul or Ghast Claw

Acts as a dagger. When it successfully hits a
creature other than an elf or undead, that
creature must succeed on a Constitution DC
10 saving throw or be paralyzed for 1 minute.
The creature can repeat the saving throw at
the end of each of its turns, ending the effect
on itself on a success. Once the claw has been
used this way (whether or not the creature was
successfully paralyzed) it loses this property.