Unfaltering

50% increased Stun Threshold
10% of Damage taken from Stunning Hits is Recovered as Life [1]

Unfaltering is a notable passive skill.

Location

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Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Indigo Oil	Indigo Oil	Crimson Oil	Unfaltering	50% increased Stun Threshold 10% of Damage taken from Stunning Hits is Recovered as Life

Version	Changes
3.21.0	The Unfaltering Notable Passive Skill no longer provides 50% reduced Stun Duration on you, or Regenerate 2% of Life per second while stationary. It now provides 10% of Damage taken from Stunning Hits is Recovered as Life, and 50% increased Stun Threshold (previously 30%). The two small Passive Skills prior no longer provide "Regenerate 0.5% of Life per second".
3.16.0	Escalation is removed from the game. Existing item anointed with that passive would have new passive Unfaltering instead. [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]