(a.k.a. Mana Points, Power, Magic Points) are the fuel that drives your spells, skills and special abilities. When you are OOM (Out Of Mana) you will be unable to do those special things until your Mana Pool replenishes. Various actions such as meditation, potions, eating food or drinking, or resting while out of combat can increase the rate at which you regain mana, depending on your game.
Some games have combat classes that have no ability to do magic but still have a pool that acts just like Mana, often calling them Action Points, or some such, instead.
This page last modified 2009-08-05 00:05:45.