Taking a specific amount of damage while Redoubt: Stone is active, triggers the effects of the skill.
This effect can't be stolen or removed by enemies.

Redoubt: Stone:
Increases Defense +10%.
Decreases Move Speed -10%.
Grants Immunity to Stun, Impale, Trip, Snare, Slow, Shackle, and Dive Trap.
Stacks a Mettle per damage received regardless of the activation of Bear's Vigor.
Adds an additional Cooldown of up to +10 sec to Redoubt: Stone once activated.