From LSWiki

Mud 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: Mud Resistor
Hidden Skill

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

Mud resistance can be increased by exposure to mud 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: mud affinity

Trainers

Association:
Weapons of Vengeance: Varn
Guild:
Quest: