Essence Extraction

15% increased Mana Recovery Rate during Effect of any Mana Flask
25% increased Flask Charges gained [1]

Essence Extraction is a notable passive skill that grants increased flask charges gained and increased mana recovery rate during effect of any mana flask.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Crimson Oil	Crimson Oil	Black Oil	Essence Extraction	15% increased Mana Recovery Rate during Effect of any Mana Flask 25% increased Flask Charges gained

Version	Changes
3.16.0	[Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]: Now grants 25% increased Flask Charges gained (up from 20%). No longer grants 25% increased Mana Regeneration Rate, or Remove a random Elemental Ailment when you use a Mana Flask. Instead, it now grants 15% increased Mana Recovery Rate during Effect of any Mana Flask.
3.15.0	No longer grants Mana Flasks gain 1 Charge every 3 seconds. It now grants 20% increased Flask Charges gained (previously 15%).
3.11.0	Now grants 25% increased Mana Regeneration Rate (up from 15%). [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]
3.8.0	Introduced to the game.