FREQUENCY: Very rare
FREQUENCY: Very rare ([Dungeon Level X])
FREQUENCY: Very rare ([Astral Plane])
NO. APPEARING: 1
ARMOR CLASS: -7
MOVE: 18"
HIT DICE: 210 hit points
% IN LAIR: 75%
TREASURE TYPE: [P] (x 4), [Z] (x2)
NO. OF ATTACKS: 2
DAMAGE/ATTACK: [SB]
SPECIAL ATTACKS: [SB]
SPECIAL DEFENSES: +3 or better weapon needed to hit, see below
MAGIC RESISTANCE: 85%
INTELLIGENCE: Supra genius
ALIGNMENT: Chaotic neutral
SIZE: L
PSIONIC ABILITY: 379
    Attack/Defense Modes: All / all
LEVEL/X.P. VALUE: X | 28,950 *
    * for destroying material form only - if Ygorl is actually killed permanently, multiply the experience points figure by 10

This fearsome slaad lord always appears as a skeletal, black, flightless,
bat-winged man 12' tall wielding a sickle which measures 8 from tip
to handle. He is always in shadow. The sickle is made of adamantite
and has the word 'death' inscribed on its blade in the slaad tongue.
It has a magical bonus of +5 and on a strike i t s victim receives instant
death unless he saves against poison, in which case the victim escapes
with only 6-36 hit points of damage. Ygorl strikes twice each round
with his sickle. Only the two slaadi lords, and others of similar status,
are immune to the effects of the sickle, the results on others being
normal and permanent.

Ygorl may use the following abilities at will: e.s.p., darkness 15'
radius, symbol of fear, detect magic, know alignment, detect invisibility,
blink, sleep, phantasmal killer, advanced illusion, symbol of hop
lessness, flame strike. Once per round he may gate in another slaad
(except Ssendam) at will, the gate opening automatically.

Once per day Ygorl may use power word: kill, any symbol, unholy
word. He may travel by astralprojection whenever he wishes.

Ygorl does not appear to have the shape change power of other highlevel
slaadi; however it is clear that the form he assumes on the Prime
Material Plane is not the same as his form in Limbo. Though no-one has
seen him on his own plane, it is said that his form there is of a large
slaad, 15' high and totally black.

When on the Prime Material Plane, Ygorl rides a neutral huge ancient
brass dragon called Shkiv and can command undead as a 13th level
cleric of the chaotic neutral alignment.
 

by Charles Stross