Iconic Monster Substitutions
This index maps familiar iconic monster roles to in-site White Box, Basic Fantasy RPG, and Basic Fantasy Field Guide replacements. It is intended as a quick conversion aid: linked names go to monster or subcategory pages, while italicized rows indicate substitutions that need heavier reskinning or added table rulings.
| Iconic monster/family | Closest in-site equivalents | Notes |
|---|---|---|
| B. — laser-shooting eye tyrant | Oculus Rex (e.g. Oculus Rex (Common)); Great Orb of Eyes; Oculus Inferni / Oculus Abyssi / Oculus Somno / Oculus Vigilans | Best “floating eye tyrant / eye-ray boss” cluster. |
| G. — lesser eye monster | Oculus Vigilans; Oculus Somno; Eye, Floating; Gaze Guard | Best handled as lesser/specialized oculus-kin. |
| C.C. — tentacled corpse-eating crawler | Tentacle Worm; Giant Centipede (e.g. Centipede, Giant (large)); Megalograptus | Tentacle Worm is the strongest swap: tentacles, paralysis, then feeding on helpless victims. |
| D.B. — false-position panther monster | Deceiver / Panther-Hydra; Blink Dog; Aghlorv | Deceiver is the strongest: black catlike monster whose mental power makes attackers misjudge its real location. |
| M.F. / I-d — brain-eating psychic octopus | Thulid; Thulid, Great Brain; Octopeople; Aboleth and Skum | Thulid is the direct replacement: squid-faced, brain-eating, telepathic, mind-blasting slaver. |
| U.H. — confusing-gaze tunnel brute | Syring / Syring Juggernaut; Aghar; Giant Boring Beetle; Purple Worm | No perfect match. Use Syring for chitinous tunnel horror, Aghar for earth-moving brute, and add a confusion gaze if needed. |
| Y-t. — serpent cult infiltrators | Serpent Men / Greater Serpent Men; Ophidian; Spirit Naga / Guardian Naga | Serpent Men are the strongest swap: ancient serpent rulers, infiltration, charm, priests, and sacrifices. |
| G-y. — astral sword raiders | Celestial Egregor; Celestial Warden; Ogre Mage; Nazgorean Frogman/Nehnite faction reskin | No direct astral sword-raider culture. Use Celestials for extraplanar warrior-mystics or Ogre Mage for martial spellcaster raiders. |
| G-z. — planar ascetic mystics | Monk-ee; Celestial Watcher; Celestial Oracle | No direct disciplined Limbo monastic analogue. Monk-ee covers the martial-arts side; Celestials cover the planar mystic side. |
| T-ri — chaos demon taxonomy | Demons (e.g. Balor); Balor; Glabrezu; Hezrou; Marilith; Nalfeshni; Vrock; Quasit; Succubus | Treat demons as the same lower-planar category; use the listed entries without preserving the T-ri taxonomy. |
| B-zu — lawful devil taxonomy | Demons (e.g. Barbed Devil); Barbed Devil; Bone Devil; Ice Devil; Imp; Lemure; Spined Devil; Erinyes | Treat devil-like demons as the same lower-planar category; use the listed entries without preserving the B-zu taxonomy. |
| K-t. — fish-frog cultists | Deep Ones (e.g. Deep One, Common); Sahuagin; Locathah; Aboleth/Skum | Deep Ones are the best fish-frog cultist swap; Sahuagin work better for militant aquatic raiders. |
| S-di — chaos-frog outsiders | Wug; Prince Frog; Giant Frog/Toad; Hezrou | No direct chaos-frog outsider match. Use Wugs or Prince Frogs, then add planar chaos, mutation, or infection themes. |
| Modrons | Advi (e.g. Advi, Avenger); Clockwork Skeleton; Clockwork Armature; Tin Golem / Household Golem / Purifier Golem / Rope Golem / Web Golem | Advi are the best “alien machine beings” swap; clockworks/golems work for construct hierarchy. |
| Yugoloths | Demons broadly (e.g. Demon, Fiend); Demon, Fiend; Eldri; Shadow Fiend; Night Hag | No direct neutral-evil mercenary fiend taxonomy. File off the demon/devil flavor and run selected Demons as contract fiends. |
| Aarakocra | Avir; Aeromi; Giant Eagle/Roc allies | Avir are the strongest swap: anthropomorphic bird-folk, mountain settlements, flight, aerial tactics, shamans, and magisters. |
| Bullywug | Wug; Kappa/Suiko; Giant Frog/Toad | Wug is the clean frog-humanoid swap; Kappa/Suiko are better for drowning/grappling water-monster variants. |
| Flumph | Flying Man-of-War; Giant Jellyfish; Gas Spore / Deep Spore | Good visual/ecological swaps, but not a strong match for the benevolent/psychic flumph personality. |
| Myconids | Florans; Ghost Shroom; Tentacled Shroom; Fungi, Violet (Medium) | Use Florans for fungus/plant-folk society; use shrooms and fungi for the monster ecology. |
| Fomorian | Cyclops; Hill Giant; Stone Giant; cursed giant reskin | Cyclops gives the one-eyed cursed giant angle; Hill/Stone Giant gives the brute chassis. |
| Galeb duhr | Aghar; Earth Elemental; Stone Golem; Xorn | Aghar or Earth Elemental is the best living-earth swap; Stone Golem works for guardian boulder-creatures. |
| Grell | Giant Flying Brain; Flying Man-of-War; Grick | No one-piece match. Combine hovering brain horror with dangling paralyzing tentacles if you want the classic feel. |
| Hook Horror | Syring / Syring Juggernaut; Grawl; Giant Tuatara; Giant Beetle (e.g. Beetle, Giant Fire) | Syring gives subterranean chitinous brute energy, but the hook-handed cave predator needs reskinning. |
| Quaggoth | Grawl; Bugbear; Grimlock; Sasquatch | Grawl or Grimlock works for savage underground humanoids; Bugbear is the simplest chassis. |
| Morkoth | Aboleth; Aquatic Naga; Kraken / Sea Monster; Octopeople | Aboleth is best for aquatic lair-control and domination, but the morkoth’s hypnotic hoard-island niche needs added flavor. |
| Derro | Moon Goblin; Grimlock; Grawl; Dwarf NPCs with madness/illusion magic | No direct mad subterranean dwarf. Start with dwarf/NPC or Moon Goblin stats and add paranoia, poison, or illusion magic. |