Temperate Marsh Random Encounters CR 12
| d100 | Total CR | Name | Numbers | CR | Type | Size | Book |
| 1-2 | 12 | Adult Hex Dragon | 1 | 12 | Dragon | Huge | Dragon #343 |
| 3-4 | 12 | Anarchic Athach | 3 | 9 | Aberration | Huge | Manual of the Planes |
| 5-6 | 12 | Bane Wraith | 4 | 8 | Undead | Medium | Heroes of Horror |
| 7-8 | 12 | Battle Horror | 1 | 12 | Construct | Medium | Lost Empires of Faerûn |
| 9-10 | 12 | Bhut | 3 | 9 | Undead | Medium | Fiend Folio |
| 11-12 | 12 | Black Willow | 2 | 10 | Plant | Huge | Dragon #358 |
| 13-14 | 12 | Blightspawned Treant | 3 | 9 | Plant | Huge | Unapproachable East |
| 15-16 | 12 | Blood Golem of Hextor | 4 | 8 | Construct | Large | Fiend Folio |
| 17-18 | 12 | Bloodmote Cloud | 11 | 6 | Undead | Fine | Libris Mortis |
| 19-20 | 12 | Bodak Five-Headed Hydra | 4 | 8 | Undead | Huge | Dragon Compendium - Volume I |
| 21-22 | 12 | Bog Giant | 9 | 6 | Giant | Large | Fiend Folio |
| 23-24 | 12 | Bog Mummy | 4 | 8 | Undead | Medium | Dragon Compendium - Volume I |
| 25-26 | 12 | Brass Half-Golem | 15 | 5 | Construct | Medium | MM2 |
| 27-28 | 12 | Bronze Serpent | 2 | 10 | Construct | Huge | MM2 |
| 29-30 | 12 | Burrow Root | 5 | 8 | Plant | Large | MM5 |
| 31-32 | 12 | Cadaver Collector | 1 | 12 | Construct | Large | MM3 |
| 33-34 | 12 | Cadaver Golem | 4 | 8 | Construct | Large | Heroes of Horror |
| 35-36 | 12 | Casurua | 1 | 12 | Undead | Large | Dragon Compendium - Volume I |
| 37-38 | 12 | Cesspit Ooze | 3 | 9 | Ooze | Large | Cityscape |
| 39-40 | 12 | Chaoswyrd | 1 | 12 | Aberration | Huge | Dragon Compendium - Volume I |
| 41 | 12 | Clay Golem | 2 | 10 | Construct | Large | MM1 |
| 42 | 12 | Clay Half-Golem | 20 | 4 | Construct | Medium | MM2 |
| 43 | 12 | Crypt Chanter | 7 | 7 | Undead | Medium | Libris Mortis |
| 44 | 12 | Diamond Golem | 1 | 12 | Construct | Large | Monsters of Faerûn |
| 45 | 12 | Dire Lion Effigy | 11 | 6 | Construct | Large | Complete Arcane |
| 46 | 12 | Dragonbone Golem | 1 | 12 | Construct | Large | Draconomicon |
| 47 | 12 | Dragonflesh Half-Golem | 20 | 4 | Construct | Medium | MM2 |
| 48 | 12 | Emerald Golem | 1 | 12 | Construct | Large | Monsters of Faerûn |
| 49 | 12 | Evolved Wraith | 11 | 6 | Undead | Medium | Libris Mortis |
| 50 | 12 | Five-Headed Hydra Zombie | 20 | 4 | Undead | Huge | Libris Mortis |
| 51 | 12 | Flesh Half-Golem | 20 | 4 | Construct | Medium | MM2 |
| 52 | 12 | Fog Giant | 5 | 8 | Giant | Huge | Monsters of Faerûn |
| 53 | 12 | Gargoyle | 16 | 4 | Humanoid | Medium | MM1 |
| 54 | 12 | Ghastly Hill Giant | 3 | 9 | Undead | Large | Dragon Compendium - Volume I |
| 55 | 12 | Ghost 5th-Level Human Fighter | 7 | 7 | Undead | Medium | MM1 |
| 56 | 12 | Ghoulish Harpy | 12 | 5 | Undead | Medium | Dragon Compendium - Volume I |
| 57 | 12 | Golem Swarm | 3 | 9 | Construct | Tiny | Dragon #309 |
| 58 | 12 | Grave Dirt Golem | 3 | 9 | Construct | Large | Libris Mortis |
| 59 | 12 | Gray Render Zombie | 11 | 6 | Undead | Large | MM1 |
| 60 | 12 | Greater Doppelganger | 1 | 12 | Humanoid | Medium | Monsters of Faerûn |
| 61 | 12 | Greenvise | 2 | 10 | Plant | Huge | MM2 |
| 62 | 12 | Gulguthydra | 1 | 12 | Aberration | Huge | Monsters of Faerûn |
| 63 | 12 | Hound Archon Zombie | 20 | 4 | Undead | Medium | Libris Mortis |
| 64 | 12 | Huecuva | 7 | 7 | Undead | Medium | Fiend Folio |
| 65 | 12 | Iron Half-Golem | 20 | 4 | Construct | Medium | MM2 |
| 66 | 12 | Ironclad Mauler | 3 | 9 | Magical Beast | Large | MM3 |
| 67 | 12 | Juvenile Hex Dragon | 5 | 8 | Dragon | Large | Dragon #343 |
| 68 | 12 | Juvenile Song Dragon | 2 | 10 | Dragon | Medium | Monsters of Faerûn |
| 69 | 12 | Leechwalker | 2 | 10 | Vermin | Medium | MM2 |
| 70 | 12 | Lesser Flame Snake | 7 | 7 | Magical Beast | Medium | Fiend Folio |
| 71 | 12 | Lion Topiary Guardian | 7 | 7 | Plant | Large | MM3 |
| 72 | 12 | Medusa Mumia | 4 | 8 | Undead | Medium | Ghostwalk |
| 73 | 12 | Mohrg | 4 | 8 | Undead | Medium | MM1 |
| 74 | 12 | Necrothane | 1 | 12 | Aberration | Medium | MM3 |
| 75 | 12 | Nerve Swimmers | 2 | 10 | Aberration | Fine | Dragon #337 |
| 76 | 12 | Nether Hound Ghast | 20 | 4 | Undead | Medium | Dragon #322 |
| 77 | 12 | Nethersight Mastiff | 5 | 8 | Magical Beast | Large | MM2 |
| 78 | 12 | Night Twist | 1 | 12 | Plant | Large | MM3 |
| 79 | 12 | Nine-Headed Hydra Skeleton | 20 | 4 | Undead | Huge | Libris Mortis |
| 80 | 12 | Ocularon | 1 | 12 | Aberration | Large | Fiend Folio |
| 81 | 12 | Plague Blight | 10 | 6 | Undead | Medium | Libris Mortis |
| 82 | 12 | Ruin Elemental | 2 | 10 | Elemental | Large | MM5 |
| 83 | 12 | Sepulchral Thief | 1 | 12 | Undead | Medium | Cityscape |
| 84 | 12 | Shredstorm | 5 | 8 | Construct | Fine | MM3 |
| 85 | 12 | Slaughter Wight | 5 | 8 | Undead | Medium | Libris Mortis |
| 86 | 12 | Spectre | 7 | 7 | Undead | Medium | MM1 |
| 87 | 12 | Spirit Naga | 3 | 9 | Aberration | Large | MM1 |
| 88 | 12 | Springheel | 5 | 8 | Fey | Medium | Dragon #355 |
| 89 | 12 | Ssvaklor | 2 | 10 | Dragon | Medium | MM3 |
| 90 | 12 | Stone Half-Golem | 20 | 4 | Construct | Medium | MM2 |
| 91 | 12 | Swamplight Lynx | 7 | 7 | Magical Beast | Large | MM2 |
| 92 | 12 | Swordwraith | 7 | 7 | Undead | Medium | Fiend Folio |
| 93 | 12 | Thayan Golem | 5 | 8 | Construct | Medium | Monsters of Faerûn |
| 94 | 12 | Thunder | 11 | 6 | Outsider | Medium | Dragon #317 |
| 95 | 12 | Triceratops Topiary Guardian | 1 | 12 | Plant | Huge | MM3 |
| 96 | 12 | War Troll | 1 | 12 | Humanoid | Large | MM3 |
| 97 | 12 | Young Adult Hex Dragon | 2 | 10 | Dragon | Large | Dragon #343 |
| 98 | 12 | Young Adult Nickel Dragon | 3 | 9 | Dragon | Large | Dragon #356 |
| 99 | 12 | Young adult Song Dragon | 1 | 12 | Dragon | Medium | Monsters of Faerûn |
| 100 | 12 | Young Song Dragon | 5 | 8 | Dragon | Small | Monsters of Faerûn |
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