| Category | Resources |
| Type | bone |
| Source | manufactured |
Bonebrack is a material comprising an amalgamation of variously colored, fused, and fossilized bones of fiendish creatures aligned with chaotic evil. If the legends prove accurate, it was fashioned by an undead demon, the progenitor of his kind. He relinquished portions of his four fundamental energies - chaos, evil, life, and fire - substituting them with negative energy. One tale suggests that the demon's transformation into an undead entity was the sole means to conclude the experiment and produce bonebrack.
Each step he takes reverberates with the sound of creaking bone striking stone. This unsettling noise emanates from his armor, not the man himself. His armor, forged through his own skilled craftsmanship, is constructed of bonebrack – a material composed of multicolored, fused, and fossilized demon bones. The more ancient and potent the demon, the stronger the bones. To be truly effective, heavy armors and shields necessitate bones from demons that lived over three centuries. This is a considerable lifespan for demons, reflective of the harsh realities of the Abyssal worlds.
Bonebrack was conceived by an undead demon, the inaugural of its kind. The demon surrendered a portion of his four foundational energies - chaos, malevolence, vitality, and conflagration - substituting them with negative energy. Becoming an undead was the sole method by which he could tolerate substances lethal to the living.
from the Godspawn Saga
Bonebrack intermittently discharges static electricity. In certain magical artifacts, this phenomenon can replenish charges or be harnessed for later use; for items possessing charges and an electrical attack capability, this translates to the accumulation of 1 charge per week.
One of the largest concentrations of bonebrack on the world Bal-Kriav is located at the ruin Valefor. When enchanters endeavor to create necromantic or malevolent magical items, they often utilize this substance. This is due to bonebrack's exceptional ability to absorb magical enchantments, akin to a sponge, thereby reducing enchanting costs by 20% and the time required for construction by 10%.
Bonebrack proves ruinous to denizens of the Mortal Systems. Upon contact with mortal flesh, it inflicts 1 hit point of abhorrent damage. Bonebrack possesses another trait that proves invaluable to undead who favor the use of armaments. A weapon coated in bonebrack, from hilt to tip, allows undead to channel their life-draining, paralysis-inducing, energy-sapping, and other malevolent touch attacks through the instrument. For instance, a lich wielding a bonebrack-imbued spear could utilize its touch attack when striking with the weapon.