FREQUENCY: Very rare
NO. APPEARING: 1-4
ARMOR CLASS: -2
MOVE: 12"
HIT DICE/POINTS: 10 HD
% IN LAIR: 40%
TREASURE TYPE: [F]
NO. OF ATTACKS: Variable
DAMAGE/ATTACK: Variable
SPECIAL ATTACKS: See below
SPECIAL DEFENSES: See below
MAGIC RESISTANCE: Standard
INTELLIGENCE: Average
ALIGNMENT: Chaotic neutral
SIZE: L (5' at shoulder)
LEVEL/X.P. VALUE: VII/1,950 + 14 per hp
 

These beings are natural shape changers and are fully capable of using all the chosen shape's non-magical powers.
They will change only into monster <x> or beast types <animal?> and will only attack one at a time, with the most powerful Oonai attacking first.
Though they cannot change into monsters of greater than 10 HD, they always retain their AC of -2 and their original HP, regardless of form.
No one knows what their actual form looks like.
 

<

Melnibonean Mythos

-

DDG

>

<
MAGICAL BEASTS:
anhkheg
aranea
basilisk
behir
bulette
blink dog
chimera
cockatrice
darkmantle
digester
displacer beast
dragonne
ethereal marauder
fiendish dire rat
frost worm
giant eagle
giant owl
girallon
gorgon
gray render
griffon
hellwasp swarm
hippogriff
hydras
kraken
krenshar
lamia
lammasu
manticore
owlbear
pegasus
phase spider
purple worm
remorhaz
roper
shocker lizard
sea cat
sphinxes
spider eater
stirge
tarrasque
unicorn
winter wolf
worg
yrthak
>

<also, see Cults of the Beast (FR) for more ideas>