| Name | CR | Type | Environment |
| Aashaq's Wyvern | 8 | dragon | temperate or warm hills |
| Aasimar | 1/2 | outsider (native) | any land |
| Aatheriexa | 7 | aberration | any land |
| Abaia | 10 | magical beast (aquatic) | warm lakes |
| Aballonian | 7 | construct | Aballon |
| Abandoned Armory | 13 | construct | any plain or battlefield |
| Abandoned One | 4 | undead | any forest or swamp |
| Abhominal | 6 | undead | any |
| Abrakarn Viper | 13 | construct (chaotic, evil) | any land |
| Abysogh | 15 | humanoid (giant) | any mountains |
| Achaierai | 5 | outsider (evil, extraplanar, lawful)
| any land (Hell)
|
| Adaptive Ooze | 7 | ooze | any land |
| Adaro | 3 | monstrous humanoid (aquatic) | warm oceans |
| Addu | 15 | magical beast (aquatic) | warm oceans |
| Adherer | 3 | monstrous humanoid | any temperate or underground |
| Adlet | 10 | humanoid (adlet, cold) | cold plains, hills, or mountains |
| Aeon, Agnoia | 14 | outsider (aeon, extraplanar) | any (Outer Planes) |
| Aeon, Akhana | 12 | outsider (aeon, extraplanar)
| any (Outer Planes)
|
| Aeon, Bythos | 16 | outsider (aeon, extraplanar)
| any (Outer Planes)
|
| Aeon, Lipika | 18 | outsider (aeon, extraplanar) | any (Outer Planes) |
| Aeon, Othaos | 5 | outsider (aeon, extraplanar) | any (Outer Planes) |
| Aeon, Paracletus | 2 | outsider (aeon, extraplanar)
| any (Outer Planes)
|
| Aeon, Pleroma | 20 | outsider (aeon, extraplanar)
| any (Outer Planes)
|
| Aeon, Synesis | 4 | outsider (aeon, extraplanar) | any (Outer Planes) |
| Aeon, Theletos | 7 | outsider (aeon, extraplanar)
| any (Outer Planes)
|
| Aerial Servant | 11 | outsider (air, elemental, extraplanar) | any (Plane of Air) |
| Agathion, Avoral | 9 | outsider (agathion, extraplanar, good)
| any air (Nirvana)
|
| Agathion, Bishop Agathion | 4 | outsider (aquatic, extraplanar, good) | any waters (Nirvana) |
| Agathion, Cervapral | 5 | outsider (agathion, extraplanar, good) | any land (Nirvana) |
| Agathion, Cervinal | 17 | outsider (agathion, extraplanar, good) | any land (Nirvana) |
| Agathion, Cetaceal | 15 | outsider (agathion, aquatic, extraplanar, good)
| any water (Nirvana)
|
| Agathion, Chelonidal | 7 | outsider (agathion, aquatic, extraplanar, good) | any land or water (Nirvana) |
| Agathion, Draconal | 20 | outsider (agathion, extraplanar, good)
| any air (Nirvana)
|
| Agathion, Leonal | 12 | outsider (agathion, extraplanar, good)
| any land (Nirvana)
|
| Agathion, Muldnal | 3 | outsider (agathion, extraplanar, good) | any underground (Nirvana) |
| Agathion, Mustelidal | 16 | outsider (agathion, extraplanar, good) | any underground (Nirvana) |
| Agathion, Procyal | 8 | outsider (agathion, extraplanar, good) | any urban (Nirvana) |
| Agathion, Reptial | 4 | outsider (agathion, extraplanar, good) | any land (Nirvana) |
| Agathion, Silvanshee | 2 | outsider (agathion, extraplanar, good)
| any land (Nirvana)
|
| Agathion, Vulpinal | 6 | outsider (agathion, extraplanar, good)
| any land (Nirvana)
|
| Agrawgh | 5 | outsider (earth, extraplanar) | any underground (Plane of Earth) |
| Ahkhat | 4 | outsider (earth, elemental, native) | warm urban |
| Ahool | 9 | magical beast | warm forests or warm ruins |
| Ahuizotl | 6 | magical beast (aquatic) | warm lakes, rivers, or swamps |
| Akaname | 1 | aberration | any urban or underground |
| Akaruzug | 15 | construct | any ruins |
| Akata | 1 | aberration
| any
|
| Akhlut | 13 | magical beast (cold, shapechanger) | cold lakes, plains, or oceans |
| Alchemical Ooze Swarm, Choleric Ooze Swarm | 2 | ooze (swarm) | any underground |
| Alchemical Ooze Swarm, Melancholic Ooze Swarm | 1 | ooze (swarm) | any underground |
| Alchemical Ooze Swarm, Phlegmatic Ooze Swarm | 1/2 | ooze (swarm) | any underground |
| Alchemical Ooze Swarm, Sanguine Ooze Swarm | 1/3 | ooze (swarm) | any underground |
| Alghollthu, Aboleth | 7 | aberration (aquatic) | any aquatic |
| Alghollthu, Enisysian | 4 | aberration (aquatic, shapechanger) | any water |
| Alghollthu, Omnipath | 18 | aberration (aquatic) | any water |
| Alghollthu, Omnipath | 18 | aberration (aquatic) | any water |
| Alghollthu, Plizeazoth | 12 | aberration (aquatic) | any water |
| Alghollthu, Thalassic Architect | 10 | aberration (aquatic) | any water |
| Alghollthu, Veiled Master | 14 | aberration (aquatic, shapechanger) | any water |
| Allip | 3 | undead (incorporeal) | any |
| Almiraj | 1 | magical beast | temperate hills, plains, or forests |
| Alp | 10 | fey | any land |
| Alpluachra | 1/2 | fey (aquatic) | temperate forests or fresh water |
| Alraune | 13 | plant | temperate forests |
| Alter Ego, Annis Hag Alter Ego | 6 | construct | cold swamps |
| Aluum | 10 | construct | any (Katapesh) |
| Amarok | 12 | magical beast | cold forests or tundra |
| Ambergrim | 6 | ooze | any forest |
| Ammut | 18 | outsider (evil, native) | any (Osirion) |
| Amoeba, Amoeba Swarm | 1 | ooze (swarm)
| any land or underground
|
| Amoeba, Giant Amoeba | 1 | ooze (aquatic)
| any land or underground
|
| Amphiptere | 4 | dragon | temperate or warm deserts, hills, or mountains |
| Amphisbaena | 4 | magical beast
| temperate hills or underground
|
| Android | 1 | humanoid (android) | any |
| Anemos | 18 | outsider (air, elemental, extraplanar) | any sky (Plane of Air or Material Plane) |
| Angazhani (High Girallon) | 9 | magical beast | warm jungle |
| Angel, Astral Deva | 14 | outsider (angel, extraplanar, good) | any good-aligned plane |
| Angel, Balisse | 8 | outsider (angel, extraplanar, good) | any good-aligned planes |
| Angel, Cassisian | 2 | outsider (angel, extraplanar, good)
| any good-aligned plane
|
| Angel, Choral | 6 | outsider (angel, extraplanar, good) | any good-aligned planes |
| Angel, Dapsara | 4 | outsider (angel, extraplanar, good) | any (Nirvana) |
| Angel, Empyrean | 20 | outsider (angel, extraplanar, good) | any good-aligned planes |
| Angel, Erelim | 6 | outsider (angel, extraplanar, good) | any good-aligned plane |
| Angel, Iophanite | 4 | outsider (angel, extraplanar, fire, good, lawful) | any (Heaven) |
| Angel, Kuribu | 3 | outsider (angel, extraplanar, good) | any good-aligned plane |
| Angel, Monadic Deva | 12 | outsider (angel, aquatic, extraplanar, good)
| any good-aligned plane
|
| Angel, Movanic Deva | 10 | outsider (angel, extraplanar, good)
| any good-aligned plane
|
| Angel, Ninkonda | 17 | outsider (angel, extraplanar, good, lawful) | any good-aligned plane |
| Angel, Planetar | 16 | outsider (angel, extraplanar, good) | any good-aligned plane |
| Angel, Solar | 23 | outsider (angel, extraplanar, good) | any good-aligned plane |
| Angelic Guardian | 5 | construct | any urban (Magnimar) |
| Anhana | 3 | fey | any forest |
| Animal Lord, Cat Lord | 11 | outsider (native, shapechanger) | warm jungles |
| Animate Aria | 9 | construct | any urban |
| Animate Dream | 8 | outsider (extraplanar, incorporeal)
| any (Ethereal Plane)
|
| Animate Hair | 1/2 | ooze | any urban |
| Animated Object | 3 | construct | any |
| Animated Tank | 12 | construct
| any
|
| Animus Shade, Medusa Animus Shade | 9 | undead (incorporeal) | temperate marshes and underground |
| Animus Shade, Medusa Animus Shade | 9 | undead (incorporeal) | temperate swamps or underground |
| Anisydaemon | 13 | outsider (daemon, evil, extraplanar) | any (Abaddon) |
| Ankheg | 3 | magical beast | temperate or warm plains |
| Ankhrav | 9 | magical beast | any hills, plains, or underground |
| Ankou | 14 | fey (extraplanar) | any (primal land of fey) |
| Ant Lion, Giant Adult Ant Lion | 6 | vermin | warm deserts |
| Ant Lion, Giant Ant Lion | 5 | vermin | warm deserts |
| Ant, Army Ant Swarm | 5 | vermin (swarm) | any tropical |
| Ant, Giant Ant | 2 | vermin | any |
| Ant, Knight Ant | 4 | vermin | any warm |
| Ant, Megapon Ant | 6 | vermin | warm plains |
| Aoandon | 12 | outsider (incorporeal, native) | any |
| Apallie | 2 | ooze | any temperate |
| Ape, Dire Ape (Gigantopithecus) | 3 | animal | warm forests |
| Ape, Gorilla | 2 | animal | warm forests |
| Ape, Megaprimatus | 8 | animal | warm forests, hills, or mountains |
| Aphorite | 1/2 | outsider (native) | any (Axis) |
| Apocalypse Horse | 25 | outsider (evil, extraplanar) | any (Abaddon) |
| Apostasy Wraith | 6 | undead (incorporeal) | any (Razmiran) |
| Aranea | 4 | magical beast (shapechanger)
| tropical forests
|
| Arcanaton | 9 | outsider | any |
| Archdevil, Baalzebul | 30 | outsider (devil, evil, extraplanar, lawful) | any (Hell) |
| Archdevil, Barbatos | 26 | outsider (evil, extraplanar, lawful, shapechanger) | any (Hell) |
| Archdevil, Belial | 28 | outsider (devil, evil, extraplanar, lawful, shapechanger) | any (Hell) |
| Archdevil, Dispater | 27 | outsider (devil, evil, extraplanar, lawful, shapechanger) | any (Hell) |
| Archdevil, Geryon | 29 | outsider (aquatic, devil, evil, extraplanar, lawful) | any (Hell) |
| Archdevil, Mammon | 28 | outsider (devil, evil, extraplanar, lawful) | any (Hell) |
| Archdevil, Mephistopheles | 30 | outsider (devil, evil, extraplanar, lawful) | any (Hell) |
| Archdevil, Moloch | 29 | outsider (devil, evil, extraplanar, lawful) | any (Hell) |
| Archon Swarm, Mote Archon Swarm | 15 | outsider (archon, extraplanar, good, lawful, swarm) | any (Heaven) |
| Archon, Bastion Archon | 20 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Codex Archon | 5 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Exscinder | 12 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Gate Archon | 17 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Hammer Archon | 18 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Harbinger Archon | 2 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Hound Archon | 4 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Lantern Archon | 2 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Legion Archon | 7 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Preceptor Archon | 9 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Archon, Shield Archon | 10 | outsider (archon, extraplanar, good, lawful)
| any (Heaven)
|
| Archon, Spyglass Archon | 3 | outsider (archon, extraplanar, good, lawful)
| any (Heaven)
|
| Archon, Stag Archon | 4 | outsider (archon, extraplanar, good, lawful, shapechanger) | any (Heaven) |
| Archon, Star Archon | 19 | outsider (archon, extraplanar, good, lawful)
| any (Heaven)
|
| Archon, Trumpet Archon | 14 | outsider (archon, extraplanar, good, lawful) | any (Heaven) |
| Ardoc Moilant | 10 | construct | any |
| Argent Warden | 8 | construct (extraplanar) | any (Heaven) |
| Argorth | 11 | aberration | temperate or cold mountains |
| Ascomoid | 5 | plant | underground |
| Ashen Forgemaster | 17 | undead (extraplanar, fire) | any land |
| Ashullian | 11 | outsider (native, water) | any water (Kaer Maga) |
| Aspidochelone | 17 | magical beast (aquatic) | ocean |
| Assassin Bug, Giant Assassin Bug | 3 | vermin | any warm |
| Assassin Bug, Great Assassin Bug | 5 | vermin | any warm |
| Assassin Vine | 3 | plant | temperate forests |
| Astomoi | 1/2 | humanoid (astomoi) | any land |
| Astral Leviathan | 18 | outsider (extraplanar) | any (Astral Plane) |
| Asura, Adhukait | 7 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Aghasura | 11 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Asurendra | 20 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Hishandura | 15 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Japalisura | 12 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Nikaramsa | 14 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Tripurasura | 2 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Upasunda | 9 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Asura, Vayuphak | 5 | outsider (asura, evil, extraplanar, lawful) | any (Hell) |
| Ataxian | 4 | outsider (chaotic, extraplanar, good) | any (Elysium) |
| Athach | 12 | humanoid (giant)
| cold or temperate hills
|
| Atomie | 1 | fey | any temperate |
| Attic Whisperer | 4 | undead
| any urban or ruins
|
| Atuikakura | 14 | magical beast (aquatic) | any oceans |
| Aurosrath | 5 | undead | any |
| Aurumvorax | 9 | magical beast
| temperate plains, hills, or forests
|
| Automaton, Champion Automaton | 10 | construct (automaton, extraplanar) | any (Axis) |
| Automaton, Familiar Automaton | 2 | construct (automaton, extraplanar) | any (Axis) |
| Automaton, Master Automaton | 20 | construct (automaton, extraplanar) | any (Axis) |
| Automaton, Sharpshooter Automaton | 15 | construct (automaton, extraplanar) | any (Axis) |
| Automaton, Stalker Automaton | 5 | construct (automaton, extraplanar) | any (Axis) |
| Avernus Razorback | 9 | outsider (evil, extraplanar, fire, lawful) | any (Hell) |
| Axe Beak | 2 | animal | temperate plains |
| Axial Monitor | 15 | outsider (extraplanar, lawful) | any urban (Axis) |
| Axiomite | 8 | outsider (extraplanar, lawful)
| any (lawful plane)
|
| Azata, Bralani | 6 | outsider (azata, chaotic, extraplanar, good, shapechanger) | any (Elysium) |
| Azata, Brijidine | 17 | outsider (azata, chaotic, earth, extraplanar, fire, good)
| any (Elysium)
|
| Azata, Gancanagh | 4 | outsider (azata, chaotic, extraplanar, good) | any (Elysium) |
| Azata, Ghaele | 13 | outsider (azata, chaotic, extraplanar, good, shapechanger) | any (Elysium) |
| Azata, Lillend | 7 | outsider (azata, chaotic, extraplanar, good) | any (Elysium) |
| Azata, Lyrakien | 2 | outsider (azata, chaotic, extraplanar, good)
| any (Elysium)
|
| Azata, Nualidu | 5 | outsider (azata, chaotic, extraplanar, good, water) | any water (Elysium) |
| Azata, Prydanu | 16 | outsider (azata, chaotic, extraplanar, good) | any (Elysium) |
| Azata, Raelis | 10 | outsider (azata, chaotic, extraplanar, good) | any (Elysium) |
| Azata, Thyrlien | 4 | outsider (azata, chaotic, extraplanar, good, shapechanger) | any (Elysium) |
| Azata, Uinuja | 15 | outsider (azata, chaotic, extraplanar, good) | any (Elysium) |
| Azata, Veranallia | 20 | outsider (azata, chaotic, extraplanar, good) | any (Elysium) |
| Azata, Yamah | 5 | outsider (azata, chaotic, extraplanar, good) | any
(Elysium) |
| Azer | 2 | outsider (extraplanar, fire)
| any land (Plane of Fire)
|
| Azgenzak | 8 | aberration (aquatic)
| warm and temperate fresh water and swamps
|
| Azi, Gandareva | 16 | dragon (aquatic) | warm aquatic |
| Azi, Sruvara | 15 | dragon | warm marshes |
| Azi, Zahhak | 19 | dragon | warm hills |
| Azlanti Chariot Beetle | 5 | vermin | any former azlanti ruin |
| Azruverda | 13 | aberration | underground |