Homebrew Demi-Construct Species Details
Demi-Constructs are beings who straddle the line between life and machinery — a blend of organic soul and crafted form. Some were forged whole by artificers, brought into existence as thinking creations. Others were once entirely mortal until tragedy or necessity replaced flesh with metal, sinew with wire. Whether born from workshop or battlefield, every Demi-Construct carries the weight of transformation — a reminder of what was lost and what was gained in the melding of man and mechanism.
Their bodies vary wildly: polished brass limbs powered by arcane coils, wooden prosthetics etched with druidic growth-runes, or sleek crystalline hearts that pulse in rhythm with their breath. Many grapple with questions of identity and belonging — are they more creation or creature, invention or individual? Yet their resilience and adaptability make them living proof that life is not defined by what it’s made of, but by the spark that drives it forward.
Demi-Construct Traits
Creature Type: Humanoid
Size: Medium (about 4–7 feet tall) or Small (about 2–4 feet tall), chosen when you select this species
Speed: 30 feet
Mechanical Constitution
You have Resistance to Poison damage and necrotic damage, as well as immunity to the poisoned condition.
Darkvision
You have Darkvision with a range of 60 feet.
Precise Hands
You have Proficiency in dexterity ability checks.
Motorized Strikes
You know the True Strike cantrip. Intelligence is your spellcasting ability for it, and you can cast it as a bonus action.
Mechanical Boon.
When you reach character level 3, you can transform as a Bonus Action using one of the options below (choose the option each time you transform). The transformation lasts for 1 minute or until you end it (no action required). Once you transform, you can’t do so again until you finish a Long Rest.
Mechanical Wings. Two metal and leather wings sprout from your back temporarily. Until the transformation ends, you have a Fly Speed equal to your Speed.
Six-Cylinder Heart. Searing light temporarily radiates from your eyes and mouth, glowing through your veins For the duration, you shed Bright Light in a 10-foot radius and Dim Light for an additional 10 feet, and at the end of each of your turns, each creature within 10 feet of you takes Fire damage equal to your Proficiency Bonus.
Steam Vent Overflow. You transform, pressure builds within your mechanical components until bursts of steam erupt from vents along your back and shoulders. Gears whir, your eyes glow with molten light, and the air fills with the sharp scent of heated metal.
When you activate this feature, each creature of your choice within 10 feet must succeed on a Constitution saving throw (based on your charisma stat) or become frightened of you until the end of your next turn, startled by the explosive release of energy.
Until the transformation ends, you trail faint steam and sparks, and once per turn when you hit a creature with an attack, you can deal extra Fire or Thunder damage equal to your Proficiency Bonus.
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