Fantasy: I Met a Fairy Descending to Earth at the Beginning

What? ! The fairy came to my door to deliver the system to me? What? ! All the immortals fell to Tianxuan Continent? What? ! The Tianxuan Continent is about to collapse, and the Emperor of Heaven appoints me to be the leader of Tianxuan? What? ! Isn't this system too confusing? It's too difficult for me! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.