FREQUENCY: Very rare (Swamp, lakeside pasture -- in any event, always near water)

FREQUENCY: Very rare ([Temperate Wilderness Swamp])

FREQUENCY: Very rare ([Temperate Freshwater Surface], [Temperate Freshwater Depths])
FREQUENCY: Very rare ([Temperate Saltwater Surface], [Temperate Saltwater Depths])

FREQUENCY: Very rare ([Tropical Wilderness Swamp])
FREQUENCY: Very rare ([Tropical Freshwater Surface], [Tropical Freshwater Depths])
FREQUENCY: Very rare ([Tropical Saltwater Surface], [Tropical Saltwater Depths])

FREQUENCY: Very rare ([Dungeon Level V])

NO. APPEARING: 1-6
ARMOR CLASS: 5
MOVE: 6"
HIT DICE: 5
% IN LAIR: 20%
TREASURE TYPE: [D](x 1/2)
NO. OF ATTACKS: 2 <(2 fists)>
DAMAGE/ATTACK: 1-10/1-10 (fist/fist) <apply weapon vs. armor modifiers?>
SPECIAL ATTACKS: Nil
SPECIAL DEFENSES: Immune to edged weapons of less than +2 bonus
MAGIC RESISTANCE: Immune to fireballs and lightning; otherwise standard
INTELLIGENCE: Semi-
ALIGNMENT: Chaotic neutral
SIZE: M
PSIONIC ABILITY: 101-200 (and see below)
    Attack/Defense Modes: A
LEVEL/X.P. VALUE: V | 280 + 5

SAVES:

This creature appears as a green humanoid with coarse, rough
features. Its appearance is misleading, however -- it is in fact a colony
of algae which, assembled in this form, has developed some mobility
and a rudimentary intelligence. Its form is only of a temporary nature.

It is immune to psionic attacks but can deliver one mind blast per day. <psionic blast>
It attacks otherwise with its powerful fists each of which can inflict 1-10 HP of damage.

Immune To Edged Weapons Of Less Than +2 Bonus: Edged weapons will pass through an algoid without doing any
damage, unless they have a magical bonus of +2 or better in which
case they inflict <1/2> normal damage.

Blunt weapons -- magical or otherwise
-- will do full normal damage.

The algoid has control over certain types of trees, similar to the control
exerted over trees by the treant (see AD&D, MM -- Treant). <>
The types of tree over which the algoid has control are those which will be found near its normal habitat
(swamp, lakeside pasture -- at all events close to water of some kind whether stagnant or otherwise);
thus it will be able to control <x2> willows, water-oaks (Quercus nigra)<>, cypresses or similar varieties of tree.
Trees thus controlled move at 3" rate and strike with two attacks per round for 1-10 HP of damage each.

Despite their immunity to certain forms of magical attack (fireball, lightning)  algoids
are particularly vulnerable to [part water] and [lower water] spells, each
of which inflict 1-6 HP of damage per experience level of the caster.
 

    by Mike Ferguson