List of all monsters across these books.
Animus
Dwarf, Derro
Losel
Lyrannikin
Thassaloss
Varrangoin
Bone Weird
Elemental, Negative Energy
Fundamental, Negative
Moilian Heart
Moilian Zombie
Vestige
Winter-Wight
Aspis
Beastman
Beetle
Bonesnapper
Booka
Brownie, Buckawn
Brownie, Quickling
Crypt Thing
Crystalmist
Dragon, Cloud
Dragon, Mist
Dragon (Oerth), Greyhawk
Dragon, Shadow
Dragonfly, Giant
Dragonnel
Elf, Grugach
Elf, Valley
Giant, Wood
Gnome, Spriggan
Golem V
Golem, Necrophidius
Grell, Wild
Gremlin
Grippli
Grung
Hobgoblin, Norker
Hook Horror
Horgar
Hound, Yeth
Iguana, Giant
Ingundi
Kech
Kyuss, Son of
Mist, Vampiric
Mite
Needleman
Plant, Carnivorous (Oerth)
Plant, Carnivorous, Vampire Cactus
Plasmoid, General Information
Rat (Oerth)
Raven/Crow
Scarecrow
Shadow, Slow
Skulk
Snail
Sprite
Taer
Tentamort
Turtle, Giant
Tyrg
Wolf, Mist
Wraith (Oerth)
Zombie, Sea
Zygom
Grist
Griveling
Jakar
Jaleeda Bird
Carpet Snake
Grythok
Scryxull
Strangleweed
Weisshund
Yphoz
Dwarf, Derro
Dwarf, Duergar
Giant, Mountain
Ogre, Half-
Ooze/Slime/Jelly I
Troll
Dwarf, Derro
Fish (Toril)
Hook Horror
Meenlock
Eye, The
Hand, The
Wolf (Greyhawk)
Gibbering Mouther, Greater
Onco
Ravenous
Su-Monster
Thousandtooth
Tlokasazotz (Olman Bat-Vampire)
Horag