The Strongest Librarian of Magic Tower

Nin-Shagari, always thought that he would become a scribe in the future. He thought his life would be normal. Shaga has always been interested in magic. Unfortunately, his father forbade him to approach magic or interact with sorcerers. However, one day he finds a black eyed ring and since then his life has not been the same. A Demon in the form of a great white wolf appeared from it and called him 'Master'. But his new powers had big consequences. Will Shaga decide to pursue his destiny of becoming the greatest wizard in Babylon? Or will he follow his father's word to live humbly as a librarian in the tower of Babylon? Then what happens if he might not be both when an Angel descends to earth and gives him another destiny? Follow Shaga's adventures in Ancient Mesopotamia. Note: - The system' will start at chapter 12 - I use multiple POV when writing these.