The time of burning
When the first great mages discovered magic the world entered a period of great prosperity. Magic eventually became almost commonplace among the people. The Great mages tried in vain to warn the people and to control the spread of magic but they were not heeded. As knowledge of how to use magic spread it became more powerful and was soon corrupted. Unharnessed and driven by the emotion and thoughts of the citizens, the magic essence was given physical form. Anger became all consuming fire, fear and greed became uncontrollable monsters.
The Guild of mages created the Megan Archology, a massive structure that protected it’s citizens from magic. Within it’s bunkers they created the great seal. A powerful binding placed on the magic that prevented the untrained from using it’s power.