Monster Almanac
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Ruins Monsters

Browse D&D 5e monsters commonly associated with the Ruins environment. This index is built directly from active monsters in the database, so new creature links appear here automatically when their environment tags are added.

Found 295 monsters
Active environments 43
Database loaded 1028 active monsters

Explore all environments

These links are generated from active monster relationships, not a hardcoded menu list.

Abyss12Arctic45Arena1Astral6Astral Sea16Battlefield1Carnival1Cave10Coastal93Desert74Divine Realm11Dream Realm3Dungeon370Extraplanar262Farmland1Feywild39Forest164Giant Holds1Grassland55Graveyard4Hell1Hill41Jungle36Laboratory3Mountain155Nine Hells18Ocean15Plains5Ravnica2River5Road6Ruins295Sewer1Shadowfell17Swamp91Temple17Tomb1Underdark136Underground109Underwater48Urban256Village1Wilderness137

Matching creatures

Pick a monster to open its full Monster Almanac entry.

Aartuk ElderPlantCR 3Open monster →Aartuk StarhorrorPlantCR 2Open monster →Aartuk WeedlingPlantCR 2Open monster →AatxeCelestialCR 5Open monster →Aaztar-gholaHumanoidCR 4Open monster →Abhorrent OverlordFiendCR 9Open monster →AbjurerHumanoidCR 9Open monster →Abjurer WizardHumanoidCR 9Open monster →AdhererAberrationCR 2Open monster →Adult Imperial DragonDragonCR 17Open monster →Adult Time DragonDragonCR 18Open monster →Alchemical GolemConstructCR 9Open monster →AlkilithFiendCR 11Open monster →Amber OozeOozeCR 5Open monster →AmmutMonstrosityCR 9Open monster →Ancient Time DragonDragonCR 26Open monster →Animated BallistaConstructCR 2Open monster →AraneaMonstrosityCR 4Open monster →ArcherHumanoidCR 3Open monster →Art Elemental MascotElementalCR 1/4Open monster →Ashen RiderCelestialCR 16Open monster →AthachGiantCR 6Open monster →Auril (First Form)MonstrosityCR 9Open monster →Auril (Second Form)ElementalCR 10Open monster →Auril (Third Form)ElementalCR 11Open monster →AurumvoraxMonstrosityCR 2Open monster →Aurumvorax Den LeaderMonstrosityCR 4Open monster →BaalzebulFiendCR 26Open monster →Baba LysagaHumanoidCR 11Open monster →BabauFiendCR 4Open monster →BalhannothAberrationCR 11Open monster →BansheeUndeadCR 4Open monster →Batiri Battle StackHumanoidCR 1Open monster →BelFiendCR 25Open monster →BerbalangAberrationCR 2Open monster →Bone SwarmUndeadCR 6Open monster →BonelessUndeadCR 1Open monster →BulezauFiendCR 3Open monster →Cadaver CollectorConstructCR 14Open monster →CaladriusFeyCR 2Open monster →Carrion StalkerMonstrosityCR 3Open monster →CarrionetteConstructCR 1Open monster →ChitineMonstrosityCR 1/2Open monster →ChokerAberrationCR 1Open monster →Clockwork DragonConstructCR 1Open monster →Clockwork HorrorConstructCR 2Open monster →Clockwork KrakenConstructCR 10Open monster →Clockwork Oaken BolterConstructCR 5Open monster →Clockwork Stone DefenderConstructCR 4Open monster →Cogwork ArchivistConstructCR 4Open monster →Core Spawn CrawlerAberrationCR 1Open monster →Core Spawn EmissaryAberrationCR 6Open monster →Core Spawn SeerAberrationCR 13Open monster →Core Spawn WormAberrationCR 15Open monster →Corpse FlowerPlantCR 8Open monster →Crag CatMonstrosityCR 1Open monster →Dark StalkerMonstrosityCR 5Open monster →Death KissAberrationCR 10Open monster →Death's HeadUndeadCR 1/2Open monster →DeathlockUndeadCR 4Open monster →Deathlock MastermindUndeadCR 8Open monster →Deathlock WightUndeadCR 3Open monster →DeinonychusBeastCR 1Open monster →Derro SavantHumanoidCR 3Open monster →DevourerUndeadCR 13Open monster →DhampirHumanoidCR 4Open monster →Dire TrollGiantCR 13Open monster →DispaterFiendCR 26Open monster →DissimortuumAberrationCR 10Open monster →DomovoiFeyCR 1Open monster →Doom GolemConstructCR 16Open monster →DoombatMonstrosityCR 1Open monster →DoppelratMonstrosityCR 2Open monster →DracohydraDragonCR 15Open monster →DracotaurDragonCR 9Open monster →Dragonblood OozeOozeCR 5Open monster →Dragonbone GolemConstructCR 14Open monster →Dragonleaf TreePlantCR 7Open monster →Dread DoppelgangerMonstrosityCR 8Open monster →Dread WarriorUndeadCR 1Open monster →Dream WraithUndeadCR 7Open monster →DullahanUndeadCR 10Open monster →Dune MimicMonstrosityCR 6Open monster →Dusk HagFeyCR 6Open monster →Duskdale WurmMonstrosityCR 13Open monster →Duskthorn DryadFeyCR 5Open monster →DybbukFiendCR 4Open monster →EblisMonstrosityCR 1Open monster →Ebon AcolyteHumanoidCR 2Open monster →EcorcheUndeadCR 5Open monster →EidolonUndeadCR 12Open monster →Elder BrainAberrationCR 14Open monster →Elder Shadow DrakeDragonCR 9Open monster →Eldritch Horror HatchlingMonstrosityCR 2Open monster →Elemental LocusConstructCR 8Open monster →Emerald Eye ConstructConstructCR 5Open monster →Emerald Order CultistHumanoidCR 1Open monster →Empty CloakUndeadCR 3Open monster →EnchanterHumanoidCR 5Open monster →EntomberUndeadCR 6Open monster →Eonic DrifterAberrationCR 7Open monster →Eonic SavantAberrationCR 10Open monster →Erina DefenderHumanoidCR 4Open monster →Eye GolemConstructCR 9Open monster →Eye of Fear and FlameAberrationCR 8Open monster →Fane GuardianConstructCR 8Open monster →FellforgedConstructCR 5Open monster →Fen WitchFeyCR 6Open monster →Fire Dancer SwarmMonstrosityCR 3Open monster →Fire Infused OgreHumanoidCR 4Open monster →Flame Scourged ScionHumanoidCR 6Open monster →FlamewrathElementalCR 5Open monster →Flesh ReaverAberrationCR 7Open monster →Floating SkullUndeadCR 1Open monster →FogwardenFeyCR 5Open monster →Forest MarauderHumanoidCR 2Open monster →Fractal MascotConstructCR 1/4Open monster →FroghemothMonstrosityCR 10Open monster →FrostveilUndeadCR 6Open monster →GallowdeadUndeadCR 4Open monster →Gearforged TemplarConstructCR 7Open monster →GhostUndeadCR 4Open monster →Ghost BoarUndeadCR 3Open monster →GhoulsteedUndeadCR 3Open monster →Giant Assassin BugMonstrosityCR 3Open monster →Giant Space HamsterBeastCR 1/4Open monster →Gibbering OrbAberrationCR 13Open monster →Githzerai EnlightenedHumanoidCR 10Open monster →Gloom FlowerPlantCR 3Open monster →Gloom WeaverHumanoidCR 9Open monster →Grave BehemothUndeadCR 15Open monster →Grell PsychicAberrationCR 4Open monster →GrisgolConstructCR 12Open monster →GrungHumanoidCR 1/4Open monster →Grung Elite WarriorHumanoidCR 2Open monster →Gulthias TreePlantCR 8Open monster →Halaster BlackcloakHumanoidCR 23Open monster →Haunting RevenantUndeadCR 10Open monster →HellcatFiendCR 5Open monster →Hellfire EngineConstructCR 16Open monster →HellwaspFiendCR 5Open monster →Hoard ScarabMonstrosityCR 1/8Open monster →HuecuvaUndeadCR 4Open monster →HutijinFiendCR 21Open monster →Inkling MascotOozeCR 1/4Open monster →Iron CobraConstructCR 4Open monster →IymrithDragonCR 23Open monster →JiangshiUndeadCR 9Open monster →King of FeathersBeastCR 8Open monster →KlauthDragonCR 25Open monster →LeucrottaMonstrosityCR 3Open monster →Living Bigby's HandConstructCR 4Open monster →Living Burning HandsConstructCR 1Open monster →Living CloudkillConstructCR 7Open monster →Living Lightning BoltConstructCR 5Open monster →Living Unseen ServantConstructCR 0Open monster →Lonely SorrowswornMonstrosityCR 9Open monster →Lord SothUndeadCR 19Open monster →Lost SorrowswornMonstrosityCR 7Open monster →ManshoonHumanoidCR 13Open monster →MaurezhiFiendCR 7Open monster →MedusaMonstrosityCR 6Open monster →MerregonFiendCR 4Open monster →MolochFiendCR 21Open monster →MolydeusFiendCR 21Open monster →MooncalfMonstrosityCR 5Open monster →Myrmidon ConstructConstructCR 7Open monster →NabassuFiendCR 15Open monster →NachzehrerUndeadCR 4Open monster →Naergoth BladelordUndeadCR 12Open monster →NagpaMonstrosityCR 17Open monster →Nalusa FalayaMonstrosityCR 8Open monster →NarzugonFiendCR 13Open monster →NechrichorOozeCR 4Open monster →NecrichorUndeadCR 7Open monster →Necrotic SlimeOozeCR 4Open monster →Needle LordPlantCR 7Open monster →NeophronFiendCR 5Open monster →NergaliidFiendCR 6Open monster →NgobouMonstrosityCR 8Open monster →NianMonstrosityCR 7Open monster →NightgauntAberrationCR 5Open monster →Nightmare ShepherdMonstrosityCR 11Open monster →NightwalkerUndeadCR 20Open monster →NimblewrightConstructCR 4Open monster →NupperiboFiendCR 1Open monster →Oaken BolterConstructCR 5Open monster →Oasis KeeperFeyCR 4Open monster →Oblex SpawnOozeCR 1/4Open monster →ObliviaxPlantCR 6Open monster →Obzedat GhostUndeadCR 8Open monster →OcularonAberrationCR 8Open monster →Oculo SwarmAberrationCR 4Open monster →OgrepedeMonstrosityCR 6Open monster →OinolothFiendCR 12Open monster →Old Leng SpiderAberrationCR 9Open monster →OozasisOozeCR 6Open monster →OphanimConstructCR 10Open monster →OphidiotaurMonstrosityCR 8Open monster →Orb WraithUndeadCR 7Open monster →OrcusFiendCR 26Open monster →OreadFeyCR 2Open monster →Origami WarriorConstructCR 2Open monster →OuroborosMonstrosityCR 14Open monster →Outer AbominationAberrationCR 15Open monster →Pact DrakeDragonCR 5Open monster →Pact LichUndeadCR 16Open monster →Pal-Rai-YukMonstrosityCR 7Open monster →Paper DrakeConstructCR 2Open monster →Paper GolemConstructCR 4Open monster →Pattern DancerFeyCR 5Open monster →Peluda DrakeDragonCR 6Open monster →Phantom WarriorUndeadCR 3Open monster →Plague DoctorHumanoidCR 4Open monster →Plague GiantGiantCR 12Open monster →Plague WightUndeadCR 5Open monster →Plant ZombiePlantCR 2Open monster →Plasmoid ExplorerOozeCR 1/4Open monster →Possessed PillarConstructCR 4Open monster →Possessed TreePlantCR 5Open monster →Priest of OsybusHumanoidCR 6Open monster →Prismatic RoperMonstrosityCR 8Open monster →Protean ScourgeAberrationCR 10Open monster →Radiant IdolCelestialCR 11Open monster →RagemawMonstrosityCR 6Open monster →RavenalaPlantCR 4Open monster →Red WidowMonstrosityCR 8Open monster →RedcapFeyCR 3Open monster →Redcap PowrieFeyCR 3Open monster →Reef GiantGiantCR 11Open monster →Relentless JuggernautFiendCR 12Open monster →Relentless SlasherFiendCR 8Open monster →RevenantUndeadCR 5Open monster →Rift SwineAberrationCR 4Open monster →Rot ReaverMonstrosityCR 5Open monster →RotscaleMonstrosityCR 5Open monster →Ruby OozeOozeCR 3Open monster →Rune GiantGiantCR 15Open monster →Rune SwarmConstructCR 4Open monster →RunehoundConstructCR 4Open monster →Runic ColossusConstructCR 21Open monster →Sabertooth BeetleMonstrosityCR 3Open monster →Sacred StatueConstructCR 0Open monster →Sahuagin BlademasterHumanoidCR 6Open monster →Sahuagin Coral SmasherHumanoidCR 2Open monster →Sand HagFeyCR 6Open monster →Sand SilhouetteUndeadCR 3Open monster →SandmanFeyCR 4Open monster →Sap DemonFiendCR 7Open monster →Sapphire JellyOozeCR 5Open monster →Screaming DevilkinFiendCR 2Open monster →Sepulchral GuardianConstructCR 7Open monster →Shadow FeyFeyCR 5Open monster →Shadow MastiffMonstrosityCR 2Open monster →Shadow Mastiff PacklordMonstrosityCR 5Open monster →Shadow OozeOozeCR 4Open monster →Shadow SkeletonUndeadCR 2Open monster →Shard SwarmConstructCR 5Open monster →ShoosuvaFiendCR 8Open monster →SibriexFiendCR 18Open monster →Skeletal JuggernautUndeadCR 5Open monster →Skittering HorrorAberrationCR 15Open monster →SkulkHumanoidCR 1/2Open monster →Skull LordUndeadCR 15Open monster →Soul ShakerUndeadCR 4Open monster →Spawn of KyussUndeadCR 5Open monster →SpellweaverAberrationCR 12Open monster →Spirit Statue MascotConstructCR 1/4Open monster →Star Spawn GrueAberrationCR 1/4Open monster →Star Spawn HulkAberrationCR 10Open monster →Star Spawn Larva MageAberrationCR 16Open monster →Star Spawn ManglerAberrationCR 5Open monster →Star Spawn SeerAberrationCR 13Open monster →Stone CursedConstructCR 1Open monster →Strahd von ZarovichUndeadCR 15Open monster →StrigoiUndeadCR 4Open monster →Sword Wraith CommanderUndeadCR 8Open monster →Sword Wraith WarriorUndeadCR 3Open monster →The AngryMonstrosityCR 13Open monster →The Angry SorrowswornMonstrosityCR 13Open monster →The Hungry SorrowswornMonstrosityCR 11Open monster →The Lonely SorrowswornMonstrosityCR 9Open monster →The Lost SorrowswornMonstrosityCR 7Open monster →The WretchedMonstrosityCR 1/4Open monster →The Wretched SorrowswornMonstrosityCR 1/4Open monster →TlincalliMonstrosityCR 5Open monster →Unspeakable HorrorMonstrosityCR 8Open monster →VargouilleFiendCR 1Open monster →Vecna the ArchlichUndeadCR 26Open monster →XanatharAberrationCR 13Open monster →Xvart SpeakerHumanoidCR 1/8Open monster →Xvart Warlock of RaxivortHumanoidCR 1Open monster →YagnolothFiendCR 11Open monster →Yuan-ti Pit MasterMonstrosityCR 5Open monster →Zombie ClotUndeadCR 6Open monster →

What this page helps you do

Browsing monsters by environment is useful when you want threats that feel grounded in a location instead of chosen in isolation. This page narrows the bestiary to creatures that naturally fit the Ruins environment.

The Ruins environment currently shows 295 monsters in Monster Almanac, while the active taxonomy currently contains 43 environment pages.

Why browse by environment?

  • Find monsters that make sense in a specific location.
  • Match creature choice to the mood of the scene.
  • Reduce prep time by narrowing the full bestiary.
  • Build encounters that feel more natural and immersive.

Using Ruins monsters in play

Once you choose a creature from this environment, decide how it appears in the world. A monster can act as a wandering threat, guardian, apex predator, local rumor, territorial danger, or part of a larger encounter chain.

This makes environment browsing useful not only for selection, but also for shaping tone, pacing, and atmosphere across the rest of the session.

Quick scene-building ideas

  • Use the environment itself to explain why the monster is here.
  • Pair the creature with fitting terrain and visibility conditions.
  • Add an NPC guide, survivor, hunter, or local witness.
  • Use CR differences to scale the danger level of the area.