FREQUENCY: Very rare
FREQUENCY: Rare ([Dungeon Level X])
FREQUENCY: Rare ([Astral Plane])

NO. APPEARING: 1 (of 9)
ARMOR CLASS: -5
MOVE: 12"
HIT DICE: 17+17
% IN LAIR: Nil
TREASURE TYPE: Nil
NO. OF ATTACKS: 3
DAMAGE/ATTACK: 5-40 (x 3)
SPECIAL ATTACKS: [SB]
SPECIAL DEFENSES: +4 or better weapons to hit, <could add?: Immune to illusion and mind-affecting magic>
MAGIC RESISTANCE: 80%
INTELLIGENCE: Supra-genius
ALIGNMENT: Lawful neutral
SIZE: L
LEVEL/X.P. VALUE: X | 15,200 + 25

Trial, judgment, and sentencing of both modrons and invading nonnatives
is the province of the 9 tertians. It is they that supervise the
police, command the law enforcement armies, declare faulty modrons
rogues, and see to it that the rules of Primus are obeyed. Eight of these
creatures report to the secundi, 1 to Primus himself.

Tertians look very human, save for their 12-foot tall size, the horns
jutting from the sides of their bald heads, and the long prehensile tails
ending in a mace-like ball. All struck by this tail must save vs. paralysis at
-4 or fall, unable to rise. In addition, tertians may cast spells as clerics of
the 24th level and as magic-users of the 20th level. As with other
hierarchs, they cannot use psionics but are immune to effects of any
psionic attack.