D100 Arcane Schools and Their Forbidden Teachings

Magic is a force of infinite wonder—and unfathomable danger. Across time and continents, arcane schools have emerged to shape its chaotic potential into structured learning. Many taught within the bounds of law and reason. But not all. This supplement explores 100 arcane schools, universities, towers, secretive cabals, and wandering enclaves. Each is known (or whispered of) for forbidden teachings—lost techniques, cursed tomes, or spells that fray the weave of reality. Some of these schools were destroyed for what they taught. Others still exist in hidden corners, recruiting new students with promises of impossible power. Use this table to inspire NPCs, backstories, rival mage factions, or arcane mysteries your players must unravel. Roll a D100, or choose freely. Nothing here is absolute—adapt as needed to match your setting’s tone and themes.