Crystalite

A rare disease, people suffering from it accumulate too much magical mineral that crystalise in and around the skeleton.
It's almost impossible to detect before the age of 20, people usually don't live past 40.

Transmission & Vectors

Genetic, follow a recessive pattern

Causes

accumulation of magical minerals

Symptoms

weakend bone structure, deformation of the skeleton, practice of spell casting becomes unstable and dangerous.

Treatment

None. Can be slow down by not using magic and avoiding some food.

Prognosis

Stage 0 : 0 - 20yo, during growth, nothing is visible as any excess of mineral is used on the growth of the skeleton.
Stage 1 : 20 - 25yo, People become more powerfull, they can use strong spells but they need to focus a lot to keep control.
Stage 2 : 25 - 30yo, Start of the paralysis. Joints begin to crystalise, deformations become visible on place most used by the spell caster's speciality (eg : Singers get crystals around their ribs). Casting a spell become very difficult and dangerous at this point. Bones start to shatter easily. Constant headache
Stage 3 : 30+ yo, slow and painfull death through either paralysis, bone shattering fall, backfiring spell, or suicide because of the constant pain.

Cultural Reception

People in late stage of this condition are feared by the public. They have many deformities, and they creates an area of wild magic. They trigger every magic sensor, disturb barriers, amplify spells out of control.
They are also in danger of being hunted, kidnapped, and kept alive as long as possible, because their bones can be very valuable on the black market, and the older they get before dying, the more valuable they become.

Type

Magical

Origin

Natural

Cycle

Chronic, Congenital

Rarity

Extremely Rare