Forethought

30% increased maximum Mana
10% increased Mana Cost of Skills [1]

Forethought is a notable passive skill that grants increased maximum mana, increased mana cost of skills and increased mana regeneration rate.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Teal Oil	Indigo Oil	Black Oil	Forethought	30% increased maximum Mana 10% increased Mana Cost of Skills

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. Now grants 15% increased Mana Regeneration Rate. [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]
3.11.0	Introduced to the game.