Format:
turn
turn on
turn off
turn all
turn <name>

The turn undead skill is one used by clerics and priests to repel and deal with
undead creatures.  It can be typically be learned by mid- to high-level
clerics, and increases significantly in power with the level of the user. This
skill has two distinct types of uses, one short term and one long term.

The short term effect occurs when the skill is activated, and has the largest
effect on undead creatures.  Dependent on the level of the undead being turned,
the skill can have many different effects.  Possible effects on creatures can
be destruction, severe damage, panic, fear, physical repulsion, minor
annoyance, and the more powerful undead will be able to ignore the effects of
the skill completely.  This part of the skill requires a significant amount
of effort on the part of the user, and can quickly drain even powerful clerics
if used often.

The long term effect is a lower level aura of protection surrounding the caster
and his/her group members.  This aura will hinder undead which attempt to
attack, dependent on the level of the undead and the level of the user.  This
part of the skill requires a continuous effort on the part of the user, and
cannot be maintained indefinitely.  It can be turned off by using the
'turn off' command, or by resting or sleeping.

With no arguments, the turn command has the following effects:
If you are fighting an undead creature, it is targeted.
If an undead creature is fighting you, it is targeted.
If neither of the above, all undead in the room are targeted.
If there are no undead in the room, you will stop using the skill.

'turn on'  tells your character to use the long term part of the skill.
'turn off' tells your character to stop using the skill.
'turn all' explicitly targets all undead in the room.

When a name is specified, that character is explicitly targeted for use by
the skill.

It should be noted that it is more effective to target a single undead
creature, as this allows the user to focus upon that creature.  It is less
effective to target masses of undead, but it can be successfully done.