From LSWiki

Crystal Resistance is DEAD! R.I.P. It isn't here anymore. Don't bother looking for it in-game.

Class: Resistance Skills
Attribute: Vitality
Pedagogy: Body Alteration
Practitioner Term: Crystal Resistor
Hidden Skill

This skill represents the conditioning of one's body to resist being damaged by the amalgam crystal and essences that partake of
its nature.

Crystal resistance can be increased by exposure to crystal damage, changing more quickly according to one's somatic adaptability. 
It will decay over time, weakening more quickly according to one's somatic adaptability.

See Also: crystal affinity

Notes

Trainers

Association:
Weapons of Vengeance: Varn
Guild:
Quest: