FREQUENCY: Very rare
FREQUENCY: Very rare ([Dungeon Level VII])
FREQUENCY: Common ([Astral Plane])
FREQUENCY: Uncommon ([Ethereal Plane])

NO. APPEARING: 1
ARMOR CLASS: 3
MOVE: 12"
HIT DICE: 8
% IN LAIR: Nil (1 Invisible Stalker, Elemental Plane of Air, TPL35-40:6th, REF4.68)
TREASURETYPE: Nil
NO. OF ATTACKS: 1
DAMAGE/ATTACK: 4-16
SPECIAL ATTACKS: Surprise on 1-5
SPECIAL DEFENSES: Invisibility
MAGIC RESISTANCE: 30%
INTELLIGENCE: High
ALIGNMENT: Neutral
SIZE: L (8' tall)
PSlONlC ABILITY: Nil
    AttackIDefense Modes: Nil

The invisible stalker is a creature from the elemental plane of air, normally
encountered on the material plane only due to the conjuration of some
magic-user. This conjuration causes the creature to serve for a period on
this plane. Invisible stalkers roam the astral and ethereal planes, and if
they are encountered there on the elemental planes, they can be dimly
seen. Otherwise or unless their opponents are able to detect/see invisible
objects, their invisibility causes opponents to subtract 2 from "to hit" dice
rolls. Unless slain on their own plane, invisible stalkers are simply sent
back to the elemental plane when damage accrued exceeds their total hit
points.

The conjuring party retains full command of the invisible stalker
summoned until it fulfills its duties or is killed. Once set upon a mission, an
invisible stalker will follow through unceasingly until it is accomplished.
They are faultless trackers within one day of a quarry's passing. They must
be destroyed to make them cease an ordered attack. Once a mission is
finished, the creature is freed to return to its own plane. The invisible
stalker is at best an unwilling servant but will not resent a brief,
uncomplicated task. Service involving a period of a week tries the
creature severely, and anything longer is certain to make it attempt to
fulfill the letter of command by perverting the spirit of it. This is not to say
that impelling the invisible stalker to serve for extended periods is
impossible, but the compulsion to cause it to do so fully and properly must
be great, i.e. a carefully worded command from a very powerful magic-
user. A simple command such as "Follow me, and guard me from any
attack," could be interpreted to mean follow at 100' distance if the
invisible stalker had been on duty over a week -or perhaps even if it
hadn't been that long, for dealing with such creatures is always a hazard.
Similarly, a command to: "Keep me safe from all harm," can be construed
by the invisible stalker to mean that it is to carry the conjuring party to its
own plane and place them in suspended animation in a secret room in its
own abode, thus carrying out its duties to the letter.

Each day of duty which an invisible stalker serves will see a 1%
cumulative chance of the creature seeking to pervert the intent of its
commands in order to be free of servitude. If no option remains open, the
stalker must continue to serve.

Invisible stalkers understand the common speech, but they do not talk any
language but their own.