A secret sealed.
A deck scattered.
Long before the age of mechanical locks, magical safes were sealed by older means. This one holds something placed inside with intention ~ something not meant to surface until the world had passed through the proper rites. The code is not a number memorized by a single mind. It was split into four parts and encoded across ten thousand number cards ~ ancient instruments passed from one generation of mystagogues to the next, each carrying one possible fragment of the truth.
A magical safe does not open with a remembered sequence. It demands that every possible number be brought into the world first ~ all ten thousand cards given form and breath in the hands of those willing to hold them. Only then may the revelation begin. After the seventh passage from sunrise to sundown, the first digit is spoken. No second digit may stir until the first has fully settled across the field. No third may emerge until the second is complete. Each number waits its turn in the order of the ancient law.
To hold one of these cards is to hold a living piece of the legend. To be the keeper whose card remains aligned when the final digit falls ~ that is a place in the story no one else can occupy.