Vitae is necessary to learn new skills. You can get vitae from primal world dailies, BH2 after hitting lvl 100, and botique item "arcane sky pill" which cost 1g ea for 100 vitae (you can only use this 10 times a day).

Vitae level bar is located in your character window by pressing "C". It is below your face icon top left.


Arcane Sky I
Arcane Sky II
Arcane Sky III
Arcane Sky IV
Arcane Sky V = 2225 vitae to level
Arcane Sky VI = 2670 vitae to level
Arcane Sky VII = 3204 vitae to level
Arcane Sky VIII = 3845 vitae to level
Arcane Sky IX = 4614 vitae to level
Arcane Sky X = 5075 vitae to level
Mirage Sky I = 5583 vitae to level
Mirage Sky II = 6xxx vitae to level
Mirage Sky III = 6755 vitae to level
Mirage Sky IV =
Mirage Sky V = 8173 vitae to level
Mirage Sky VI = 8991 vitae to level
Mirage Sky VII = 9890 vitae to level
Mirage Sky VIII = 10879 vitae to level
Mirage Sky IX = 11967 vitae to level
Mirage Sky X = Max Level (no more vitae from quests or pills given)


Primal World Dailies:

1. Assault on Sky Owl -Started at Resistance Force Spy at 348, 469
2. Defending Green -Started at Green Wood Heart Guardian at 324, 543
3. Raccoon Alliance -Started at Raccoon Bamboo Chief at 375, 506
4. Rescue Raccoon - Started at Raccoon Guard at 363, 559

Arcane sky pill gives 250 Vitae and it can be used 20 times per day