Mana Regen (buff)
From Ars Magica
This buff will regenerate mana at a faster rate than normal.
This buff is applied when walking through an Essence Nexus, Light Nexus, or Dark Nexus if the nexus' charge is at 10% or higher. You can also obtain a lesser version of this buff by eating a Mana Cake. The buff ID of Mana Regen is 42.