Reincarnated as a Tower In the Multiverse

Under unknown circumstances, MC found himself reincarnated as a magical tower where he have to expand his powers and build his world while accepting warriors and participants from the whole universe... ============ -The MC will be omnipotent in his tower but he will leave the tower and travel to other worlds and learn other techniques -Story will have multiple POVs and focus on multiple characters and their journeys in the tower -chapters will be short because i am afraid i will lose passion if i force myself to make long ones