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CR
Name
Type
Size
Alignment
Habitat
Tags
    9
    Nycaloth Legacy This doesn't reflect the latest rules and lore. Learn More Monster Manual (2014)
    Fiend (yugoloth)
    Large
    Neutral Evil
    Yugoloth
    9
    Nycaloth (summoner variant) Legacy This doesn't reflect the latest rules and lore. Learn More Monster Manual (2014)
    Fiend (yugoloth)
    Large
    Neutral Evil
    Yugoloth
    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
    8
    Obzedat Ghost Guildmasters’ Guide to Ravnica
    Undead
    Medium
    Lawful Evil
    Orzhov
    2
    Ogre Skeleton Tales from the Yawning Portal
    Undead
    Large
    Chaotic Evil
    Arctic(…)
    2
    Ogre Zombie Monster Manual
    Undead
    Large
    Neutral Evil
    Underdark(…)
    2
    Ogre Zombie Legacy This doesn't reflect the latest rules and lore. Learn More Basic Rules (2014)
    Undead
    Large
    Neutral Evil
    20
    Ogrémoch Princes of the Apocalypse
    Elemental
    Gargantuan
    Neutral Evil
    Prince of Elemental Evil
    12
    Oinoloth Mordenkainen Presents: Monsters of the Multiverse
    Fiend (yugoloth)
    Medium
    Typically Neutral Evil
    Desert(…)
    12
    Oinoloth Legacy This doesn't reflect the latest rules and lore. Learn More Mordenkainen’s Tome of Foes
    Fiend (yugoloth)
    Medium
    Neutral Evil
    Desert(…)
    Yugoloth
    18
    Olhydra Princes of the Apocalypse
    Elemental
    Huge
    Neutral Evil
    Prince of Elemental Evil
    10
    Ooze Master Tales from the Yawning Portal
    Undead
    Huge
    Lawful Evil
    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
    4
    Oread Mythic Odysseys of Theros
    Fey
    Medium
    Chaotic 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
    6
    Otyugh Mutate Phandelver and Below: The Shattered Obelisk
    Aberration
    Large
    Typically Neutral
    0
    Paper Bird The Wild Beyond the Witchlight
    Construct
    Tiny
    Unaligned