I Became The Heir Of The Constellation

Three years ago, a tower appeared, and the world called the transcendent being that governed the tower a 'constellation'. Tiring! [You have become the successor to the nameless constellation] It was a name I had never heard before. [Current constellation status: Missing] No support, no advice, no protection. All that's left is an unknown authority and the seat of the lost constellation...What the fuck is this?