After some feedback in the WIP section, I came out with this final work, fairly different from what I had in mind.

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Tobias woke up to find himself in a cave. A strange cave, a place where he had never been before. He started to explore the place, looking for a way out, without ever asking why he was there. After a while, he arrived in a chamber. In front of him, an opening leading to the Universe. It was his own Universe. Floating in the centre of this Universe, a majestic bright stone, displaying images from his life. At first, nonsense lines but with time, he managed to figure out the meaning of those symbols. He could see a sword, a key, a skull, love... all things that had a connection with himself. Mesmerized by this vision, Tobias did not notice as he started to fade. The images became faster and intense and the watcher started to disappear, engulfed by the misterious floating stone. Devoured by his own existance, he became just another engraving among so many others in the morbid rock, trapped forever inside that cave...