Turning undead

From LSWiki

   +
  +-+-+     Turning Undead
    |
    +       'turn undead'

 With sufficient skill in invocation, you will be able to invoke
 the holy might of Yehovah against the undead; abominations against
 all living beings.  Depending on the strength of your invocation,
 the undead may be chased away, damaged, or utterly destroyed.
 The strength of your invocation will increase both with skill
 and with your general advancement.