Conquest of the New World
Legends tell of powerful sorcerers and priests of distant time, able to accomplish impressive feats well beyond the abilities of mere mortals. Flight, great blasts of fire, healing terrible wounds, and controlling the minds or bodies of others, are all spoken of in hushed tones and awed whispers. Even the surviving texts from the Numan Empire describe individuals capable of marvelous feats and hint at training and teaching for these abilities.
The Dark Ages after the fall of Numa were a time of great fear and superstition. Individuals with any hint of mystical power (and a great many without) were persecuted, hunted down and burnt at the stake for suspicion of misdeeds. Petty kings and warlords were known to employ such practitioners of magic, but often these same patrons would quietly dispose of these tools for fear of being turned against them. Individuals with such powers would either hide their talents for fear of persecution, or never learn the use of magic due to lack of training or knowledge about the art.
The teachings of the Vaticine Church and most of its offspring (excepting the Church of Avalon), condemn magic as the work of demons and devils, meant to tempt the faithful. The rise of the Inquisition has made it even more dangerous to be seen to have such powers, and most individuals with any talent either hide their skills carefully, or move often to avoid the clutches of the Inquisitors.