" There are twelve tasks to complete, when you step through this door,” Hadrian replied, his tone jittery. It was clear he had no love for this place. “There are t-twelve, in homage to the great mage philosopher Orpheus, to c-commemorate the twelve labors of Hercules, and also to symbolize the twelve years it takes for Jupiter to orbit the sun. "

― Bella Forrest , The Test (The Secret of Spellshadow Manor #5)