(right = Ssendam)

FREQUENCY: Very rare
FREQUENCY: Very rare ([Dungeon Level X])
FREQUENCY: Very rare ([Astral Plane])
NO. APPEARING: 1
ARMOR CLASS: <+3:> -6
MOVE: 16" / 19"
HIT DICE: 197 hit points
% IN LAIR: 30%
TREASURE TYPE: [A] (x 4), [F] (x 2)
NO. OF ATTACKS: 3 or 1
DAMAGE/ATTACK: 2-16/2-16/2-16 plus drain levels or special
SPECIAL ATTACKS: Spells
SPECIAL DEFENSES: Regeneration, spells; +3 or better weapon to hit
MAGIC RESISTANCE: 85%
INTELLIGENCE: Supra genius
ALIGNMENT: Chaotic neutral
SIZE: M
PSIONIC ABILITY: 379
    Attack/Defense Modes: All / all
LEVEL/X.P. VALUE: X | 28, 695 *
    * for destroying material form only - if actually killed, multiply experience points figure shown by 10

This weird creature is claimed by some tales to be the most powerful of the slaadi.
He either wanders the [Prime Material Plane] as a man,
wearing no armour but using the Black Sword as a weapon (acts as a power word: stun on any victim struck), <link>
or as a golden aemoba with a man's brain in place of a nucleus.
In either case he attacks as a monster of 16+ hit dice.
In ameobic form he fights by extruding three corrosive pseudopods each 10' long,
each inflicting 2-16 hit points of damage on its victim and each draining 1-4 experience levels
(saving throw permitted but a successful save merely halves the number of experience levels drained,
with fractions rounded down).

He may [gate] in another [slaad] of any type (except Ygorl) at will,
the gate opening automatically.

He may use the following powers at will:
fear,
[darkness 15' radius],
[blink],
[ESP],
[know alignment],
[dispel magic] (at 32nd level),
[detect invisibility],
[detect magic],
[locate object],
[flame strike (at double power),
[ultravision] 60',
[mass charm],
[astral projection],
[symbol of insanity],
[death spell].

Once per day he can use [unholy word] and any power word. <make links, space>

Once per day he may also fulfil another's wish,
though this takes a melee round during which he can do nothing else,
so it is rarely used.

<again, spaces added above, slight corrections to the spell names>

While alive,
he regenerates 3 hit points per melee round.
He may [shape change] at will and travel the planes instantaneously.
He has 18(00) strength.

When encountered,
Ssendam always gives his true name,
though woe betide he who tries to use it.

Like gods and demi-gods,
Ssendam always leaves his true form behind when he travels the planes.
In [Limbo],
his form is that of a large, golden slaad.

Ssendam can only be damaged by a weapon with a +3 bonus or better.
 

    by Charles Stross