Eldritch Field

Eldritch Field is a subbiome that can appear on the surface and underground and also a tag for content including monsters, furniture, weapons, crafting materials, and even a tenant.

It can be found on planets of the following type:
 * Fd:Atropus
 * Fd:Nightmare Atropus
 * Fd:Primeval Forest
 * Fd:Volcanic Primeval
 * Dark planets (need confirmation)
 * Penumbra
 * Proto-Planet

Monsters
The following monsters have a chance of spawning in Elder Biomes: Fd:Star Spawn of Cthulhu, Fd:Deep One, Fd:Wraith, Flesh Reaper, Fd:Ravager, FleshLeech

Critters
Elder Biomes may contain the following critters: Fd:Elder Beetle, Fd:Glowing Ball, Fd:Battrix, Fd:Sky Wurm

Blocks
Main block: Fd:Elder Soil. Other blocks: Fd:Mutated Elder Soil, Fd:Hive Block, Fd:Elder Stone

Ores
Chances of finding ores depends on the tier the planet is found on; Tier 1-3 planets will only have Telebrium Crystal and Crystal Erchius Fuel. Increasing tiers will add additional possible ores, with nocxium being the last (i.e., highest tiered planet) to be added to the list.

Fd:Raw Nocxium, Fd:Telebrium Crystal, Fd:Crystal Erchius Fuel, Fd:Trianglium Ore, Fd:Solarium Ore, Fd:Irradium Ore, Fd:Prisilite Ore, Fd:Effigium Ore

Crafting Materials
Aside from the possibility of finding nocxium, these biomes tend to house various books which can be used for crafting.

Plants
(Plants are listed by their seed, not product.)

Fd:Algae Pod, Toxictop Seed, Fd:Oonforta Seed, Fd:Deathblossom, Fd:Vashta

Objects
Cthulhu Statue, Insect Mound, Strange Monument, Monolith, Stone Pillar, Broken Stone Pillar, Elder Chest

Microdungeons
Microdungeons on the surface include Elder- and Ice microdungeons.