Homebrew Eridian Species Details

 

Eridians are dense, silicon-based beings originating from extreme, high-pressure environments inhospitable to most life. Their bodies are compact and multifaceted, formed from interlocking crystalline structures that grant them exceptional durability and precision control. Rather than relying on lungs or traditional respiration, Eridians sustain themselves through internal chemical processes, allowing them to exist in environments such as vacuum, toxic atmospheres, or deep subterranean conditions.

 

Communication among Eridians is achieved through complex patterns of resonant vibrations—musical, tonal signals that carry layered meaning. To other species, this often sounds like shifting chords or metallic harmonics, though many Eridians learn to approximate spoken languages through careful modulation.

 

Eridians possess an innate ability to manipulate raw matter at a fundamental level, rapidly assembling simple crystalline structures to suit their needs. This capacity is not limitless, but it reflects a deeply ingrained instinct for engineering and problem-solving. Combined with their natural aptitude for tools and construction, Eridians excel as inventors, technicians, and methodical thinkers.

 

Despite their resilience, Eridians are not without limitations. Their physiology is finely tuned to stable conditions, and extreme heat can disrupt their internal balance. To compensate, many develop methods of shielding themselves from hostile environments, enclosing their bodies within protective fields when necessary.

 

In unfamiliar settings, Eridians are often perceived as analytical and deliberate. They tend to approach problems systematically, valuing cooperation, logic, and practical solutions over intuition or impulse. While their mannerisms can seem alien, their intentions are typically straightforward: understand the system, stabilize it, and improve it where possible.

Eridian Traits

Hi

Ability Score Increase

Choose one:

• +2 Constitution, +1 Intelligence

  or

• +2 Intelligence, +1 Constitution

 

Darkvision

You have darkvision with a range of 60 feet.

Vacuum-Tolerant Physiology

You do not need to breathe and are immune to suffocation.

You have advantage on saving throws against inhaled hazards (gas, spores, etc.).

Dense Frame

• You have advantage on Strength checks made to resist being moved or knocked prone.

• Your carrying capacity is doubled.

 

Intergrated Tooling

• You have proficiency with tinker’s tools.

• You can use your body as a set of tinker’s tools, and you can perform tool checks without needing separate tools

 

Crystalline Synthesis

• You can magically synthesize small, simple objects composed of inert crystalline material.

• As an action, you create one nonmagical object in your hand or on the ground within 5 ft.

• The object must:

  • Fit within a 1-foot cube

  • Weigh no more than 5 lb

  • Be made of simple materials (no complex mechanisms, no electronics, no alchemical items, no weapons with moving parts beyond something like a basic club or spike)

• The object lasts for 1 hour, then harmlessly disintegrates.

• You can use this feature a number of times equal to your proficiency bonus per long rest.

• At 5th level, the size increases to a 2-foot cube and 10 lb.

• At 11th level, 3-foot cube and 20 lb.

Design intent: utility (wedges, braces, handholds, simple tools), not free gear generation or combat spam.

Rapid Structural Analysis

• You can cast Identify as a ritual without material components.

• Once per long rest, you can cast Mending as a bonus action.

 

Heat Sensitivity

• You have disadvantage on saving throws against extreme heat effects.

• In environments above comfortable temperature (DM-defined), you require twice the usual water intake or gain one level of exhaustion after a long rest.