Oaken Bolter
Oblex Spawn
Ochre Jelly
Octopus
Odin, Norse Avatar
Odin, Norse Greater God
Oghma, Celtic Avatar
Oghma, Celtic Intermediate God
O Kuni Nushi, Japanese Avatar
O Kuni Nushi, Japanese Intermediate God
Ogre
OGRES
Ogre Battering Ram
Ogre Bolt Launcher
Ogre Chain Brute
Ogre Howdah
Ogre Zombie
Oinoloth
Oliphant
Ometeotl, Aztec Avatar
Ometeotl, Aztec Greater God
Oni
OOZES
Ooze Mephit
Orc (playable races)
Orc
Orc Blade of Ilneval
Orc Claw of Luthic
Orc Eye of Gruumsh
Orc Hand of Yurtrus
Orc Nurtured of Yurtrus
Orc Red Fang of Shargaas
Orc War Chief
ORCS
Orog
Orthon
Osiris, Egyptian Avatar
Osiris, Egyptian Intermediate God
Otyugh
O Wata Tsu Mi, Japanese Avatar
O Wata Tsu Mi, Japanese Intermediate God
Ox
Owl
Owlbear