Homebrew Yin Spirit Species Details
Physical Description:
Yin Spirits are planar echoes of thought, magic, or emotion given form. Often appearing as elegant, small humanoids with drifting movements and a soft magical aura, they seem more illusion than flesh. Drawn from shadowy realms, stasis magic, or forgotten pacts, they are both ancient and childlike—vessels of immense power in fragile, otherworldly bodies.
Most Yin Spirits awaken from arcane seals or old ruins, bound to locations, masters, or magical duties. Their presence causes space to shimmer subtly, and their voices often echo like distant wind. They are not fully alive, yet not undead; they exist in a liminal state where time and matter blur.
Unaging and untethered from mortal worries, Yin Spirits often become wandering spellcasters or guardians. They do not age, though their behaviour can evolve with the emotions and relationships they form.
Society:
Yin Spirits have no unified culture. Born from aetheric anomalies, planar interference, or created as spiritual anchors, they often live bound to magical locations, objects, or contracts. Rarely seen in the outside world, most are guardians, scholars, or sealed beings that only interact with mortals when their bindings shift.
Yin Spirits may form relationships with arcane masters or protect hidden places of power. Some rebel against their creators, seeking freedom and knowledge beyond their intended purpose.
Relations:
Due to their spectral presence and mystical nature, Yin Spirits are viewed with caution or reverence. Scholars and sorcerers often regard them as valuable allies or dangerous anomalies. Most humanoids are unsettled by their aura and unnatural behaviour.
They may find kinship with warlocks, aberrants, and other outsiders—beings who also live on the edge of reality.
Alignment and Religion:
Yin Spirits are often neutral, following internal codes tied to their contract or binding. While they are not born with a sense of morality, those who experience mortal life can develop empathy, curiosity, or even rebellion.
Some Yin Spirits revere knowledge itself, ancient forces of entropy, or forgotten gods of twilight and endings.
Adventurers:
Most Yin Spirits adventure due to a broken seal, forgotten contract, or inner yearning for purpose. They tend to become Sorcerers, Warlocks, or Wizards, though some manifest as Rogues or Monks due to their nimble, fluid movements.
Names:
Names are often given by others—titles like Keeper, Watcher, or Little One. Those who choose their own often take elegant or old-sounding names, like Beatrice, Velian, or Noctra.
Yin Spirit Traits
Born of arcane rifts or sustained by planar energy, Yin Spirits blur the line between magic and being. These beings exhibit strange powers, tied to the void or otherworldly dimensions.Ability Score Increase
Your Charisma score increases by 2, and your Dexterity score increases by 1.
Age
Yin Spirits mature at a similar rate to humans but live much longer due to their ethereal nature. They can live for several centuries, reaching old age only when their connection to the shadow realm starts to fade. Their maximum age can reach 700 years or more, depending on their ties to the Shadowfell.
Speed
Your base walking speed is 30 feet.
Size
Yin Spirits are typically Medium or Small. Their height can vary between 5 and 6 feet, but due to their ethereal nature, some may appear shorter or more fragile.
Shadow Dependency
While you are in dim light or darkness, you are fully empowered. However, if you find yourself in bright light, your connection to the shadows weakens. You suffer disadvantage on attack rolls and ability checks when exposed to bright light, as your shadow form is disrupted. If you remain in bright light for a prolonged period (more than 10 minutes), you begin to take 1d4 radiant damage per minute as the light burns away at your essence. This effect stops as soon as you return to dim light or darkness.
Starlight Body
Your body is not fully corporeal, made of swirling starlight and ephemeral shadow. You do not need to eat or drink, and you are immune to diseases. You have advantage on checks and saves made to resist effects that target or alter your physical form, such as grapple, petrification, or paralysis.
Planar Resistance
Your connection to cosmic forces grants you resistance to force and radiant damage. You also have advantage on saving throws against being charmed or banished.
Void Pulse
As a manifestation of your otherworldly origin, you can release a controlled pulse of void energy.
As an action, all creatures of your choice within 10 feet of you must succeed on a Constitution saving throw (DC = 8 + your Charisma modifier + your proficiency bonus) or take necrotic damage equal to your level, and lose advantage on their next attack roll or ability check before the end of their next turn.
You can use this feature once per long rest. At 11th level, you can use it twice per long rest.
Phaseform
As a bonus action, you can activate your Phaseform, causing your body to become semi-ethereal. While in this form:
- You can move through creatures and non-magical objects as if they were difficult terrain.
- If you end your turn inside an object or creature, you take 1d10 force damage and are pushed to the nearest unoccupied space.
- You gain resistance to nonmagical bludgeoning, piercing, and slashing damage.
Phaseform lasts for 1 minute or until you are incapacitated. Once used, you must complete a short or long rest to use it again.
Innate Arcana
Your soul resonates with cosmic forces, granting you an innate magical talent.
You know the Thaumaturgy cantrip. At 3rd level, you can cast Disguise Self once per long rest. At 5th level, you can cast Misty Step once per long rest. Intelligence is your spellcasting ability for these spells.
You regain the ability to cast these spells in this way when you finish a long rest.
Languages
You can speak, read, and write Common and Infernal. Yin Spirits have a natural affinity for the language of the Shadowfell, and many learn Infernal as part of their heritage.
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