To run a Lovecraftian Sword & Sorcery adventure in Castles & Crusades, lean heavily into cosmic dread, decaying sorcery, alien geometry, and sanity-draining horrors. Use the D100 Random Encounter Table below to stock wilderness travels, subterranean crawls, or city ruins with eldritch threats.
D100 Sword & Sorcery Lovecraftian Encounter Table
| d100 | Encounter Description |
| 01–04 | The Bleeding Monolith: A jagged obsidian obelisk weeping a tar-like substance. Challenge 3 (Cha) check or gain 1 point of madness. |
| 05–08 | Migo Scout: A crustacean-like spore-creature from space harvests brain matter using strange copper cylinders. |
| 09–12 | Possessed Zealots: $2d6$ cultists chanting in Pre-Human Aklo; their eyes burn with cold, blue fire. |
| 13–16 | Deep One Hybrid: A local coastal villager whose frog-like features and bulging eyes indicate an upcoming descent into the ocean depths. |
| 17–20 | Alien Spore Fog: A sickly violet fog rolls in. Flesh exposed to it sprouts tiny, blinking eyes for $1d4$ hours. |
| 21–24 | Uneuclidean Ruins: Non-Euclidean archways warp line-of-sight. Movement through the area is tripled, and missile attacks suffer a -4 penalty. |
| 25–28 | Chthonian Young: A giant, tentacled earth-burrower causing localized tremors. Challenge 4 (Str) to avoid being swallowed whole. |
| 29–32 | Sorcerer of the Void: A mad warlord wielding an artifact powered by a dying star; casts Phantasmal Killer as a 6th-level Caster. |
| 33–36 | Night-Gaunt Swarm: Shadowy, faceless winged beings attempt to grapple the party and fly them into the upper atmosphere. |
| 37–40 | Ghoulish Feast: $1d4+1$ rubbery-skinned Ghouls gnawing on the corpse of a dead sorcerer. One holds a scroll of alien spells. |
| 41–44 | Color Out of Space: An unearthly, luminescent vapor draining vitality. Lose $1d4$ Constitution points per round spent inside it. |
| 45–48 | Star-Spawn Idol: A jade idol depicting a sleeping tentacled god. Looking directly at it requires a Wisdom check or causes temporary paralysis. |
| 49–52 | The Hound of Tindalos: A predatory horror emerging from an angular corner (30° or sharp edge) to hunt down time-travelers or reality-warpers. |
| 53–56 | Flesh-Warped Beast: A displaced dire bear fused with fungal tendrils and extra limbs. High AC, high damage output. |
| 57–60 | Serpent-Folk Infiltrator: A disguised Serpent Man noble using illusion magic to manipulate local Scribe and Merchant guilds. |
| 61–64 | Blood-Moon Eclipse: The sky turns blood-red; all necromancy spells operate at +2 caster levels for the next hour. |
| 65–68 | Whispering Pit: A cavern entrance broadcasting psychic chatter. Characters who listen gain temporary spell slots or permanent madness. |
| 69–72 | Yithian Automaton: An ancient brass device left behind by the Great Race of Yith, recording environmental data and defending itself with light beams. |
| 73–76 | Desiccated Mummy: An ancient high priest of Yog-Sothoth preserved in resin, capable of casting high-tier illusion and gate magic. |
| 77–80 | Cthonian Spores: Spores fill the air; breathing them forces a Constitution check or causes green tendrils to burst from the skin. |
| 81–84 | Shantak Flight: A horse-headed, scaled flying monstrosity swoops down to carry off livestock or party mounts. |
| 85–88 | The Astral Portal: An unstable rift opening directly to the Cold Wastes of Kadath; freezing wind causes $2d6$ cold damage per round. |
| 89–92 | Formless Spawn: A black, shifting mass of protoplasm immune to bludgeoning damage; uses acid to melt armor and flesh. |
| 93–96 | Avatar of Nyarlathotep: A tall, dark stranger offering dark pacts, ancient knowledge, or powerful cursed weapons in exchange for human sacrifices. |
| 97–00 | Awakened Shoggoth: A massive, towering wall of eyes, mouths, and slime crushing everything in its path. Defeat is unlikely; escape is required. |
Mechanical Notes for Castles & Crusades:
Sanity Checks: Use standard Attribute Checks (Wisdom or Charisma) with a Challenge Class (CC) scaling from 10 + HD of the cosmic entity.
Prime Attributes: Characters with Wisdom or Charisma as a Prime Attribute set their base target number to 12 when resisting cosmic horror; non-Primes use 18.