Mysticism
Lets you recover extra Spell Points every day.
You normally recover 1 spell point each day.
Recommended for: A Hero on a map with long travel times between castles, and few/no Magic Wells or Magic Springs. Even then, you are probably better off with Intelligence. Drakon of the Dragon Slayer campaign might benefit from this at his final mission, as there are absolutely no mage guilds or magic wells to recharge his magic points.