Magna's Trust Master reward is the skill Magical Potential.
Entries for different versions of Magna.4★ - No. 1143: The student of a great mage that has mastered all magic. While Magna's natural abilities with magic were nothing to sneeze at, he could be arrogant and prickly at times. Despite announcing his ambition to one day surpass Mediena as a great mage, he seems to have struggled with looking her in the eyes whenever she was around.5★ - No. 1144: A young man who studied the ways of magic under the great mage, Mediena. Magna reluctantly joined Leopold on a journey to change him back from his current lion form. Though tenacious like his teacher, Magna's inflated ego often prevented him from learning from others. Most of his studying seems to have been done privately.6★ - No. 1146: A young man who was destined to be a great mage. Following the teachings of his mentor, Mediena, Magna internalized that "the essence of magic is making one's wishes come true." Would he live out his life somewhere as a young man or would he grow old and finally surpass Mediena? The possibilities danced through his mind.
Magna's stats at his highest levels are as follows (with no passive abilities taken into account), along with the maximum amount of stat points that can be increased through pot-enhancements:
Magna can equip the following weapons: Staff, Rod, Mace
He can equip the following armor: Hat, Clothes, Robe
He can equip accessories.
Magna is Latin for "great".