Mana Addiction

When one tests for Mage talent, there were different conditions to be met to be a mage, one of the vital ones was to be sure that the user had both a Mana Heart and a Mana Brain, if one had one of these they couldn' be a mage and wasn'tharmful but instead helpful to them. This case was seen in the Knights who had only Mana Heart, adn strnegthened their bodies using it.

This was entirely different for those who had Mana Brains, as they required constant injections of mana,without which they would die. This condition was diagnose by Ian Page as Mana Addiction.

Trivia

 * As a common fact those who had Mana Brains, were frequently manipulated by mages, who tortured them.