Mana Reserve

The name for the organ that collects mana which every mortal race contains. Commonly called a mana ocean or ocean for short. The larger this organ is, the more mana one can contain at any given moment. The amount of time it takes for a ocean fill entirely is the "recharge rate". There is no correlation between the size of an ocean and its recharge rate. Both are genetic, similar to height or shoulder width. Can be bred into or out of a population I suppose.