The Flame Nation’s Annihilator

The only thing the transmigrant wanted was to transmigrate back to the familiar place he came from, but he accidentally became a powerhouse in another world. What chain reactions will follow when an ordinary civil servant transmigrates to an ancient world? How much effort and luck will someone who has no interest in the other world's wine, women, wealth, or status, and only wants to go home, need to make it back?