
Given that your Mana Pool is directly tied to your Mind stat, I could understand it being considered mental fortitude, however how would you explain a Thaumaturge's use of Blizzard spells to effectively restore your depleted mental fortitude, and why does the use of Fire spells completely halt its replenishment? The idea would suggest that casting Blizzard allows the THM to think so clearly, or have such a strong mind, that he never runs out of Mana, while casting Fire makes the THM brain dead.