Hardened Hide

Description (Cliffe)
Hardened Hide, Passive Effect.

Hardened Hide: This ability marks a new level of Endurance within its user. While this passive is active, the user's endurance works like a shield that has grown over his own body, hardening his skin and muscles into an added layer of protective armor when needed. This ability marks the start of just one path to a heightened state of being, even though this ability remains in its lowest and weakest form.

Hardened Hide helps to protect the user from most types of non-magical damage. Both bludgeoning and slashing attacks, unless empowered arcanely in some way, deal  half  their total standard damage against the user while this ability is active.

Reference
Chapter 64 "Overdue Explanations" (Cliffe)