FREQUENCY: Very rare ([Cold Wilderness Forest], [Cold Wilderness Swamp])
FREQUENCY: Very rare ([Temperate Wilderness Forest], [Temperate Wilderness Swamp])
FREQUENCY: Very rare ([Tropical Wilderness Forest], [Tropical Wilderness Swamp])
FREQUENCY: Very rare ([Dungeon Level VII])

NO. APPEARING: 1-4
ARMOR CLASS: -2
MOVE: 6" / 6" (MC: B)
HIT DICE: 8+2
% IN LAIR: 10%
TREASURE TYPE: [I]
NO. OF ATTACKS: 4 tentacles
DAMAGE/ATTACK: 1d6+1 each
SPECIAL ATTACKS: Constitution drain
SPECIAL DEFENSES: +2 or better weapon to hit
MAGIC RESISTANCE: 10%
INTELLIGENCE: High
ALIGNMENT: Neutral evil
SIZE: M (6' diameter)
LEVEL/X.P. VALUE: VII | 1700 + 12

SAVES: 8.9.10.9.11

These free-willed elementals normally inhabit the Para-elemental Plane <technically, 'para-elementals' .. 'Para-elemental Plane of Ice" .. i think : however, see the cold susceptibility below>
of Air but sometimes are found in cool, damp places with little or no <originally read: "para-elemental plane of Vapor">
sunlight. Mihstu look like clouds of swirling mist and can seep through
small cracks and openings. They can shape their bodies at will and, when
attacking, they will form 4solid tentacles tipped with razor-sharp talons. A
mihstu can also envelope a victim in its mistybodyanddrain 1 constitution
point per round. If a victim's CON reaches 0, death occurs. One
point of constitution may be regained per full day of rest. During this time
wounds can be healed only by magic.

Mihstu can be harmed only by +2 or better weapons.
They are immune to all electrical and missile attacks (even magic missile). <see the note above>
Cold-based attacks only stun them for 2d6 rounds.

Mihstu are solitary creatures and prefer to be left alone.
They will assume a ghostly shape to scare away intruders.
However, they may perform tasks for powerful magic-users in exchange for substantial payment of powerful magic items.
 

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They can shape their bodies at will and, when
attacking, they will form 4 solid tentacles tipped with razor-sharp talons.
A mihstu can also envelope a victim in its misty body and drain 1 constitution
point per round. If a victim's constitution reaches 0, death occurs.

Mihstu can only be attacked by +2 or better weapons.
Cold-based attacks only stun them for 2d6 rounds.

*
>