poly-table

Cave

d8Sound or Smell
1Distant dripping water
2Faint whispers or murmurs
3Rotten, meaty stench
4Cold, metallic scent
5Sudden, distant rockfall
6Sickly sweet aroma
7Chittering or clicking
8Unnatural silence
d12Entrance Type
1Wide gaping maw
2Narrow crevice
3Waterlogged opening
4Overgrown hollow
5Sinkhole descent
6Collapsed tunnel
7Hidden hole behind a waterfall / foliage
8Jagged cliffside gap
9Animal den
10Smoke-seeping crack
11Ruined structure access
12Carved stone archway
d20Hazards and Sights
1Unstable rocks
2Poisonous fumes
3A cracked stone seal
4Living shadows
5Hidden pitfall
6Ancient markings
7Nest of a cave beast
8Ancient bones and remains
9Magnetic or strange metal deposits
10Fungal infestation
11Tunnels that shift
12Cave-in waiting to happen
13Strange crystals
14Corpse of an explorer
15Swarming insects
16Unnatural chill
17Slime-covered walls and ceiling
18Geyser or thermal vent
19Pulsing walls
20An impossible light source

Elevation Change

d4Affected Area
1Small
2Medium
3Large
4Huge
d8Rate of Change
1-3Shallow
4-6Fair
7-8Steep
d12Nature
1-7Natural, result of time and elements
8-9Natural, but out of place
10-11Unnatural, but work of labor
12Unnatural, made by magic

Rocks

d4Affected Area
1Small
2Medium
3Large
4Huge
d8Formation
1-3large number of small rocks
4-6small number of large rocks
7-8outcropping
d12Nature
1-7Natural, result of time and elements
8-9Natural, but out of place
10-11Unnatural, but work of labor
12Unnatural, made by magic
d20Oddity
1-17Nothing Unusual
18The rocks have been written on
19The rocks are arranged in a specific pattern
20The rocks are magical

Soil

d4Affected Area
1Small
2Medium
3Large
4Huge
d8Appearance
1-3Almost indistinguishable from surroundings
4-7Clear difference
8Huge difference
d12Fecundity
1-6less than surrounding
7same
8-12more than surrounding
d20Cause of Fecundity
1-10Natural (minerals, nutrients, …)
11-19Artificial (fertilized, poisoned, …)
20Magical