Inside a Luminarch Cache of the Cosmos.
A construct designed to let one live an entire lifetime within a parallel cosmos contained entirely within the Luminarch Cache of the Cosmos itself.
While inside, one could experience years, centuries, or millennia. And yet in Reality? Only hours, days, or weeks would pass.
And during that false lifetime, an individual could attain terrifying levels of power. Unless they died or exceeded the limits of the Luminarch Cache, their time inside would continue.
Once it ended, they would return to their true existence, all the while retaining ten percent of the tremendous power they had gained.
A simple enough treasure for something only found in the higher levels of the Infinite Cosmic Tower, where Cosmic Entities and Cosmic Filament Beings roamed freely.
At this moment, Alexander was within one such Cache, living the life of a Cerulean Golem Druid.