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CR
Name
Type
Size
Alignment
Habitat
Tags
    5
    Oaken Bolter Legacy This doesn't reflect the latest rules and lore. Learn More Mordenkainen’s Tome of Foes
    Construct
    Medium
    Unaligned
    Forest(…)
    construct
    1/4
    Oblex Spawn Mordenkainen Presents: Monsters of the Multiverse
    Ooze
    Tiny
    Typically Lawful Evil
    Swamp(…)
    1/4
    Oblex Spawn Legacy This doesn't reflect the latest rules and lore. Learn More Mordenkainen’s Tome of Foes
    Ooze
    Tiny
    Lawful Evil
    Swamp(…)
    8
    Obzedat Ghost Guildmasters’ Guide to Ravnica
    Undead
    Medium
    Lawful Evil
    Orzhov
    2
    Ochre Jelly Monster Manual
    Ooze
    Large
    Unaligned
    Underdark
    2
    Ochre Jelly Legacy This doesn't reflect the latest rules and lore. Learn More Basic Rules (2014)
    Ooze
    Large
    Unaligned
    Underdark
    2
    Ogre Skeleton Tales from the Yawning Portal
    Undead
    Large
    Chaotic Evil
    Arctic(…)
    2
    Ogre Zombie Monster Manual
    Undead
    Large
    Neutral Evil
    Underdark(…)
    10
    Ooze Master Tales from the Yawning Portal
    Undead
    Huge
    Lawful Evil
    1/2
    Ooze-Folk Lost Laboratory of Kwalish
    Ooze
    Medium
    Unaligned
    26
    Orcus Legacy This doesn't reflect the latest rules and lore. Learn More Out of the Abyss
    Fiend (demon)
    Huge
    Chaotic Evil
    Demon Lord
    26
    Orcus Mordenkainen Presents: Monsters of the Multiverse
    Fiend (demon)
    Huge
    Chaotic Evil
    9
    Oriq Blood Mage Strixhaven: A Curriculum of Chaos
    Humanoid (warlock)
    Medium
    Typically Neutral Evil
    10
    Orthon Mordenkainen Presents: Monsters of the Multiverse
    Fiend (devil)
    Large
    Typically Lawful Evil
    Desert(…)
    10
    Orthon Legacy This doesn't reflect the latest rules and lore. Learn More Mordenkainen’s Tome of Foes
    Fiend (devil)
    Large
    Lawful Evil
    Desert(…)
    Devil(…)
    10
    Oshundo the Alhoon Phandelver and Below: The Shattered Obelisk
    Undead (mind flayer, wizard)
    Medium
    Neutral Evil
    0
    Paper Bird The Wild Beyond the Witchlight
    Construct
    Tiny
    Unaligned
    13
    Pari Journeys through the Radiant Citadel
    Celestial
    Medium
    Typically Lawful Good
    3
    Phantom Warrior Curse of Strahd
    Undead
    Medium
    Any Alignment
    16
    Phoenix Mordenkainen Presents: Monsters of the Multiverse
    Elemental
    Gargantuan
    Typically Neutral
    Desert(…)