Underground Random Encounters CR 8
| d100 | Total CR | Name | Numbers | CR | Type | Size | Book |
| 1-2 | 8 | All-Consuming Hunger | 1 | 8 | Undead | Diminutive | Underdark |
| 3-4 | 8 | Arachnoid Mouther | 2 | 6 | Aberration | Large | Underdark |
| 5-6 | 8 | Arcane Guard | 1 | 8 | Humanoid | Medium | MM4 |
| 7-8 | 8 | Ascomoid | 4 | 4 | Plant | Medium | Dungeonscape |
| 9-10 | 8 | Bane Wraith | 1 | 8 | Undead | Medium | Heroes of Horror |
| 11-12 | 8 | Baneguard | 10 | 2 | Undead | Medium | Lost Empires of Faerûn |
| 13-14 | 8 | Beacon Moth | 3 | 5 | Magical Beast | Huge | Dragon #322 |
| 15-16 | 8 | Blood Golem of Hextor | 1 | 8 | Construct | Large | Fiend Folio |
| 17-18 | 8 | Bloodhulk Crusher | 1 | 8 | Undead | Huge | MM4 |
| 19 | 8 | Bloodhulk Giant | 2 | 6 | Undead | Large | MM4 |
| 20 | 8 | Bloodmote Cloud | 2 | 6 | Undead | Fine | Libris Mortis |
| 21 | 8 | Boar Topiary Guardian | 7 | 3 | Plant | Medium | MM3 |
| 22 | 8 | Bodak Five-Headed Hydra | 1 | 8 | Undead | Huge | Dragon Compendium - Volume I |
| 23 | 8 | Bone Rat Swarm | 7 | 3 | Undead | Tiny | Libris Mortis |
| 24 | 8 | Boneclaw | 3 | 5 | Undead | Large | MM3 |
| 25 | 8 | Bonedrinker | 2 | 6 | Undead | Medium | MM3 |
| 26 | 8 | Bonespitter | 7 | 3 | Undead | Medium | Dragon Compendium - Volume I |
| 27 | 8 | Cadaver Golem | 1 | 8 | Construct | Large | Heroes of Horror |
| 28 | 8 | Carrion Crawler | 5 | 4 | Aberration | Large | MM1 |
| 29 | 8 | Cave Ankylosaurus | 2 | 6 | Animal | Large | Miniatures Handbook |
| 30 | 8 | Cave Triceratop | 3 | 5 | Animal | Large | Miniatures Handbook |
| 31 | 8 | Cave Troll | 1 | 8 | Giant | Large | MM3 |
| 32 | 8 | Cave Tyrannosaurus | 3 | 5 | Animal | Large | Miniatures Handbook |
| 33 | 8 | Centipede Swarm | 4 | 4 | Vermin | Diminutive | MM1 |
| 34 | 8 | Cinderspawn | 2 | 6 | Undead | Large | Libris Mortis |
| 35 | 8 | Clay Half-Golem | 5 | 4 | Construct | Medium | MM2 |
| 36 | 8 | Cloaker | 3 | 5 | Aberration | Large | MM1 |
| 37 | 8 | Copper Horror | 8 | 2 | Construct | Small | Dragon #350 |
| 38 | 8 | Corpse Rat Swarm | 4 | 4 | Undead | Tiny | Libris Mortis |
| 39 | 8 | Crawling Slaughter | 1 | 8 | Undead | Gargantuan | Dragon #309 |
| 40 | 8 | Crested Felldrake | 16 | 1 | Dragon | Small | MM2 |
| 41 | 8 | Deadly Dancer | 7 | 3 | Aberration | Medium | Tome of Magic |
| 42 | 8 | Death Dog | 11 | 2 | Magical Beast | Medium | Fiend Folio |
| 43 | 8 | Deathlock | 7 | 3 | Undead | Medium | Libris Mortis |
| 44 | 8 | Deep Hound | 5 | 4 | Magical Beast | Large | Races of Stone |
| 45 | 8 | Deep Rothé | 11 | 2 | Magical Beast | Medium | Forgotten Realms Campaign Setting |
| 46 | 8 | Derro | 7 | 3 | Humanoid | Small | MM1 |
| 47 | 8 | Destrachan | 1 | 8 | Aberration | Large | MM1 |
| 48 | 8 | Dire Lion Effigy | 2 | 6 | Construct | Large | Complete Arcane |
| 49 | 8 | Direguard | 7 | 3 | Undead | Medium | Lost Empires of Faerûn |
| 50 | 8 | Doppelganger | 6 | 3 | Humanoid | Medium | MM1 |
| 51 | 8 | Dragonflesh Half-Golem | 5 | 4 | Construct | Medium | MM2 |
| 52 | 8 | Elder Psurlon | 1 | 8 | Aberration | Medium | Lords of Madness |
| 53 | 8 | Electrum Horror | 5 | 4 | Construct | Small | MM2 |
| 54 | 8 | Entomber | 3 | 5 | Undead | Medium | Libris Mortis |
| 55 | 8 | Eunuch Clockwork | 5 | 4 | Construct | Medium | Dragon #334 |
| 56 | 8 | Evolved Wraith | 2 | 6 | Undead | Medium | Libris Mortis |
| 57 | 8 | Faerzress-infused Minotaur | 3 | 5 | Humanoid | Large | Underdark |
| 58 | 8 | Fang Golem | 2 | 6 | Construct | Large | MM4 |
| 59 | 8 | Fey’ri | 11 | 2 | Outsider | Medium | Monsters of Faerûn |
| 60 | 8 | Fire Spectre | 2 | 6 | Undead | Medium | Ghostwalk |
| 61 | 8 | Flameskull | 5 | 4 | Undead | Tiny | Lost Empires of Faerûn |
| 62 | 8 | Flesh Half-Golem | 5 | 4 | Construct | Medium | MM2 |
| 63 | 8 | Fleshvigor Ghoul | 11 | 2 | Undead | Medium | Dragon #315 |
| 64 | 8 | Forsaken Shell | 2 | 6 | Undead | Medium | Libris Mortis |
| 65 | 8 | Foulwing | 3 | 5 | Aberration | Huge | Lost Empires of Faerûn |
| 66 | 8 | Garbler | 1 | 8 | Aberration | Small | Tome of Magic |
| 67 | 8 | Gargoyle | 5 | 4 | Humanoid | Medium | MM1 |
| 68 | 8 | Ghoulish Harpy | 3 | 5 | Undead | Medium | Dragon Compendium - Volume I |
| 69 | 8 | Giant Cockroach | 11 | 2 | Vermin | Medium | Underdark |
| 70 | 8 | Giant Tick | 11 | 2 | Vermin | Small | Dragon #321 |
| 71 | 8 | Gravehound | 7 | 3 | Undead | Medium | Miniatures Handbook |
| 72 | 8 | Gravorg | 1 | 8 | Magical Beast | Large | MM2 |
| 73 | 8 | Greater Shadow | 1 | 8 | Undead | Medium | MM1 |
| 74 | 8 | Grell | 7 | 3 | Aberration | Medium | MM2 |
| 75 | 8 | Grimlock | 20 | 1 | Humanoid | Medium | MM1 |
| 76 | 8 | Groundling | 8 | 2 | Humanoid | Medium | Monsters of Faerûn |
| 77 | 8 | Guard Bat | 7 | 3 | Animal | Large | MM2 |
| 78 | 8 | Guttersnipe | 3 | 5 | Construct | Medium | MM2 |
| 79 | 8 | Hammerer | 5 | 4 | Construct | Medium | MM2 |
| 80 | 8 | Helmed Horror | 1 | 8 | Construct | Medium | Lost Empires of Faerûn |
| 81 | 8 | Horned Felldrake | 7 | 3 | Dragon | Medium | MM2 |
| 82 | 8 | Hound Archon Zombie | 5 | 4 | Undead | Medium | Libris Mortis |
| 83 | 8 | Hunting Bat | 7 | 3 | Animal | Medium | MM2 |
| 84 | 8 | Ice Beast Gargoyle | 7 | 3 | Construct | Medium | Frostburn |
| 85 | 8 | Illithocyte | 11 | 2 | Aberration | Small | Dragon #337 |
| 86 | 8 | Ineffable Horror | 3 | 5 | Aberration | Large | Underdark |
| 87 | 8 | Iron Half-Golem | 5 | 4 | Construct | Medium | MM2 |
| 88 | 8 | Ixzan | 5 | 4 | Aberration | Medium | Lost Empires of Faerûn |
| 89 | 8 | Juvenile Hex Dragon | 1 | 8 | Dragon | Large | Dragon #343 |
| 90 | 8 | Juvenile Mist Dragon | 2 | 6 | Dragon | Medium | Dragons of Faerûn |
| 91 | 8 | Juvenile Phaerimm | 3 | 5 | Aberration | Small | Lost Empires of Faerûn |
| 92 | 8 | Juvenile Shadow Dragon | 1 | 8 | Dragon | Medium | Draconomicon |
| 93 | 8 | Legendary Snake | 1 | 8 | Animal | Large | MM2 |
| 94 | 8 | Lesser Bonedrinker | 5 | 4 | Undead | Small | MM3 |
| 95 | 8 | Lifeleech Otyugh | 1 | 8 | Aberration | Large | MM3 |
| 96 | 8 | Lith | 2 | 6 | Magical Beast | Medium | Underdark |
| 97 | 8 | Living Wall 7th-Level Elf Sorcerer | 1 | 8 | Undead | Medium | Dragon #343 |
| 98 | 8 | Medium Ectoplasmic Vermin | 16 | 1 | Vermin | Medium | Ghostwalk |
| 99 | 8 | Medusa Mumia | 1 | 8 | Undead | Medium | Ghostwalk |
| 100 | 8 | Metalmaster | 3 | 5 | Magical Beast | Large | Lost Empires of Faerûn |
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