Hunter's Gambit

25% increased Damage Over Time with Bow Skills
10% increased Skill Effect Duration
+10% to Chaos Damage over Time Multiplier [1]

Hunter's Gambit is a notable passive skill that grants increased skill effect duration. It also grants additional chaos damage over time multiplier and increased damage over time with bows skills.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Clear Oil	Verdant Oil	Silver Oil	Hunter's Gambit	25% increased Damage Over Time with Bow Skills 10% increased Skill Effect Duration +10% to Chaos Damage over Time Multiplier

Version	Changes
3.16.0	Make clusters more unique compared to each other as well as having a more clear identity. Remove niche or unneeded stats entirely, or shift them to Masteries. Improve many notables that have had secondary stats removed. [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] Now grants 25% increased Damage Over Time with Bow Skills (up from 24%). No longer grants 24% increased Damage with Bows.
3.11.0	Many passive skill clusters offered the same thing as other clusters, with the only differences being the location on the tree and the number of passive skills in the cluster. We also wanted to reduce the power of some clusters that were overly efficient, and increase the power of clusters that were inefficient. [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]^[1] No longer grants Poisons you inflict deal Damage 10% faster.
3.7.0	Introduced to the game

↑ Bex_GGG (June 17, 2020). "All Notables and Keystones in Path of Exile: Harvest". Official Path of Exile forums. Retrieved November 2, 2021.