Monsters
List of monsters and creatures described with updated rules.
- Stalwart (Athleta Superbus)
- Merchant Caravan
- Aqrab — The Desert Merchants
- Troll (Monstrum Regenerans)
- Troglodyte
- Pixie
- Rhagodessa
- Orc (Orcus Communis)
- Ogre (Homo Monstrum)
- Mek
- Lizardman
- Kobold (Canis Minor)
- Kha — Walkers Between
- Insect Swarm
- Hobgoblin (Goblinus Ferox)
- Goblin (Goblinus Communis)
- Gnoll (Crocuta Bipedis)
- Hellhound
- Green Slime
- Gelatinous Cube
- Efreeti
- Predatory Nature Spirits
- Faerie
- Mystara Unique Creatures Index
- Hunakoi and Besu
- Silverbell Aranea
- The Dimension of Nightmares — Creature Supplement
- The Odic-Dryad — The Poisoned Heartwood
- Dryad Variants — The Heartwood Sisters
- The Disease — Lycanthropy Transmission
- Diseases of Mystara
- Aranea Variants — Supplement II
- Monster Player Characters — Unified Leveling System
- Monstrous Aranea — Nithian Experiment Series
- Aranea Variants — Species Supplement
- Cockatrice
- Chimera
- Dragon, Chromatic & Gold
- Centipede, Giant
- Centaur
- Cat, Great
- Carrion Crawler
- Camel
- Caecilia
- Bugbear
- Boar: Normal, Great
- Blink Dog
- Blast Spore
- Monsters
- Black Pudding
- Black Ball (Deadly Sphere)
- Berserker
- Beholder, Undead
- Beholder
- Beetle, Giant: Fire, Oil, Tiger
- Bee, Giant
- Bat: Normal, Giant, Vampire
- Basilisk
- Bandit
- Baboon, Rock
- Athach
- Archon
- Ape, White
- Ape, Snow
- Ant, Giant
- Animal Herd
- Anhkheg
- Aerial Servant (Haoou)
- Adapter
- Acolyte
- Acteon (Elk Centaur)