Underground Random Encounters CR 6
| d100 | Total CR | Name | Numbers | CR | Type | Size | Book |
| 1-2 | 6 | Adamantine Spider | 3 | 3 | Construct | Small | Drow of the Underdark |
| 3-4 | 6 | Alchemical Undead | 1 | 6 | Undead | Medium | Dragon #350 |
| 5-6 | 6 | Arachnoid Mouther | 1 | 6 | Aberration | Large | Underdark |
| 7-8 | 6 | Ascomoid | 2 | 4 | Plant | Medium | Dungeonscape |
| 9-10 | 6 | Baneguard | 5 | 2 | Undead | Medium | Lost Empires of Faerûn |
| 11-12 | 6 | Baphitaur | 4 | 2 | Outsider | Medium | Underdark |
| 13-14 | 6 | Blade Guardian | 1 | 6 | Construct | Medium | Complete Warrior |
| 15-16 | 6 | Bloodhulk Fighter | 2 | 4 | Undead | Medium | MM4 |
| 17 | 6 | Bloodhulk Giant | 1 | 6 | Undead | Large | MM4 |
| 18 | 6 | Bloodmote Cloud | 1 | 6 | Undead | Fine | Libris Mortis |
| 19 | 6 | Bluespawn Stoneglider | 3 | 3 | Humanoid | Medium | Dragons of Faerûn |
| 20 | 6 | Boar Topiary Guardian | 3 | 3 | Plant | Medium | MM3 |
| 21 | 6 | Boggle | 3 | 3 | Humanoid | Small | MM2 |
| 22 | 6 | Bone Rat Swarm | 3 | 3 | Undead | Tiny | Libris Mortis |
| 23 | 6 | Bonebat | 5 | 2 | Undead | Medium | Monsters of Faerûn |
| 24 | 6 | Bonedrinker | 1 | 6 | Undead | Medium | MM3 |
| 25 | 6 | Bonesinger | 3 | 3 | Undead | Medium | Ghostwalk |
| 26 | 6 | Bonespitter | 3 | 3 | Undead | Medium | Dragon Compendium - Volume I |
| 27 | 6 | Bonespur | 3 | 3 | Undead | Large | MM5 |
| 28 | 6 | Carrion Crawler | 2 | 4 | Aberration | Large | MM1 |
| 29 | 6 | Cave Ankylosaurus | 1 | 6 | Animal | Large | Miniatures Handbook |
| 30 | 6 | Cave Fisher | 4 | 2 | Vermin | Medium | Dragon #355 |
| 31 | 6 | Centipede Swarm | 2 | 4 | Vermin | Diminutive | MM1 |
| 32 | 6 | Changeling, 1st-Level Warrior | 20 | 1/2 | Humanoid | Medium | MM3 |
| 33 | 6 | Chitine | 8 | 1 | Humanoid | Small | Monsters of Faerûn |
| 34 | 6 | Cinderspawn | 1 | 6 | Undead | Large | Libris Mortis |
| 35 | 6 | Clay Half-Golem | 2 | 4 | Construct | Medium | MM2 |
| 36 | 6 | Copper Horror | 5 | 2 | Construct | Small | Dragon #350 |
| 37 | 6 | Corpse Rat Swarm | 2 | 4 | Undead | Tiny | Libris Mortis |
| 38 | 6 | Crawling Claw | 4 | 2 | Construct | Tiny | Lost Empires of Faerûn |
| 39 | 6 | Crested Felldrake | 11 | 1 | Dragon | Small | MM2 |
| 40 | 6 | Cursed Spirit | 3 | 3 | Undead | Medium | Miniatures Handbook |
| 41 | 6 | Curst | 1 | 6 | Undead | Medium | Monsters of Faerûn |
| 42 | 6 | Darkmantle | 11 | 1 | Magical Beast | Small | MM1 |
| 43 | 6 | Deadly Dancer | 3 | 3 | Aberration | Medium | Tome of Magic |
| 44 | 6 | Death Dog | 5 | 2 | Magical Beast | Medium | Fiend Folio |
| 45 | 6 | Deathlock | 3 | 3 | Undead | Medium | Libris Mortis |
| 46 | 6 | Deep Hound | 2 | 4 | Magical Beast | Large | Races of Stone |
| 47 | 6 | Defacer | 1 | 6 | Undead | Medium | MM4 |
| 48 | 6 | Dekanter Goblin | 11 | 1 | Humanoid | Medium | Monsters of Faerûn |
| 49 | 6 | Derro | 3 | 3 | Humanoid | Small | MM1 |
| 50 | 6 | Desiccator | 5 | 2 | Undead | Small | Libris Mortis |
| 51 | 6 | Dire Lion Effigy | 1 | 6 | Construct | Large | Complete Arcane |
| 52 | 6 | Dire Maggot | 5 | 2 | Vermin | Small | Libris Mortis |
| 53 | 6 | Dire Rat Zombie | 20 | 1/2 | Undead | Small | Libris Mortis |
| 54 | 6 | Direguard | 3 | 3 | Undead | Medium | Lost Empires of Faerûn |
| 55 | 6 | Doppelganger | 3 | 3 | Humanoid | Medium | MM1 |
| 56 | 6 | Dragonflesh Half-Golem | 2 | 4 | Construct | Medium | MM2 |
| 57 | 6 | Dread | 4 | 2 | Undead | Small | Lost Empires of Faerûn |
| 58 | 6 | Dread Guard | 5 | 2 | Construct | Medium | MM2 |
| 59 | 6 | Dread Ram | 3 | 3 | Undead | Large | Ghostwalk |
| 60 | 6 | Drow Werebat | 2 | 4 | Humanoid | Medium | Lost Empires of Faerûn |
| 61 | 6 | Dungeon Phantom | 1 | 6 | Undead | Medium | Dragon #355 |
| 62 | 6 | Electrum Horror | 2 | 4 | Construct | Small | MM2 |
| 63 | 6 | Eunuch Clockwork | 2 | 4 | Construct | Medium | Dragon #334 |
| 64 | 6 | Evolved Wraith | 1 | 6 | Undead | Medium | Libris Mortis |
| 65 | 6 | Fang Golem | 1 | 6 | Construct | Large | MM4 |
| 66 | 6 | Fey’ri | 5 | 2 | Outsider | Medium | Monsters of Faerûn |
| 67 | 6 | Fihyr | 3 | 3 | Aberration | Small | MM2 |
| 68 | 6 | Fire Spectre | 1 | 6 | Undead | Medium | Ghostwalk |
| 69 | 6 | Flesh Half-Golem | 2 | 4 | Construct | Medium | MM2 |
| 70 | 6 | Fleshvigor Ghoul | 4 | 2 | Undead | Medium | Dragon #315 |
| 71 | 6 | Footpad Lizard | 2 | 4 | Animal | Large | Drow of the Underdark |
| 72 | 6 | Force Golem | 2 | 4 | Construct | Large | MM5 |
| 73 | 6 | Forsaken Shell | 1 | 6 | Undead | Medium | Libris Mortis |
| 74 | 6 | Gargantuan Monstrous Centipede | 1 | 6 | Vermin | Gargantuan | MM1 |
| 75 | 6 | Gargoyle | 2 | 4 | Humanoid | Medium | MM1 |
| 76 | 6 | Gargoyle Kir-Lanan | 5 | 2 | Humanoid | Medium | Forgotten Realms Campaign Setting |
| 77 | 6 | Ghast | 3 | 3 | Undead | Medium | MM1 |
| 78 | 6 | Ghosteater | 3 | 3 | Aberration | Medium | Ghostwalk |
| 79 | 6 | Ghoul | 11 | 1 | Undead | Medium | MM1 |
| 80 | 6 | Giant Cockroach | 5 | 2 | Vermin | Medium | Underdark |
| 81 | 6 | Giant Sun Spider | 5 | 2 | Vermin | Large | Lost Empires of Faerûn |
| 82 | 6 | Glasspane Horror | 1 | 6 | Aberration | Large | Dragon Compendium - Volume I |
| 83 | 6 | Glitterfire | 1 | 6 | Ooze | Medium | MM3 |
| 84 | 6 | Gnome Warrior Zombie | 20 | 1/2 | Undead | Small | Libris Mortis |
| 85 | 6 | Gravehound | 3 | 3 | Undead | Medium | Miniatures Handbook |
| 86 | 6 | Green Warder | 2 | 4 | Plant | Medium | Monsters of Faerûn |
| 87 | 6 | Grell | 3 | 3 | Aberration | Medium | MM2 |
| 88 | 6 | Grick | 3 | 3 | Aberration | Medium | MM1 |
| 89 | 6 | Grimlock | 11 | 1 | Humanoid | Medium | MM1 |
| 90 | 6 | Groundling | 5 | 2 | Humanoid | Medium | Monsters of Faerûn |
| 91 | 6 | Guardgoyle | 4 | 2 | Construct | Small | Waterdeep |
| 92 | 6 | Hairy Spider | 20 | 1/2 | Vermin | Fine | Monsters of Faerûn |
| 93 | 6 | Half-illithid Lizardfolk | 2 | 4 | Aberration | Medium | Fiend Folio |
| 94 | 6 | Hammerer | 2 | 4 | Construct | Medium | MM2 |
| 95 | 6 | Harpoon Spider | 2 | 4 | Aberration | Large | MM3 |
| 96 | 6 | Hivenest Minotaur Zombie | 1 | 6 | Undead | Large | Dungeonscape |
| 97 | 6 | Hook Horror | 1 | 6 | Aberration | Large | MM2 |
| 98 | 6 | Horned Felldrake | 3 | 3 | Dragon | Medium | MM2 |
| 99 | 6 | Hound Archon Zombie | 2 | 4 | Undead | Medium | Libris Mortis |
| 100 | 6 | Huge Monstrous Centipede | 5 | 2 | Vermin | Huge | MM1 |
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