I'm Sniping Gods and Demons in the Apocalyptic World

In the apocalyptic world, some people choose mechanical ascension, some choose traditional cultivation, some choose vast magic, and some choose genetic transcendence... And I chose to become a Holy Lancer, master the light, and kill gods and demons. But even so, life in the last days seems to be full of dangers. But one day, after my future self wrote a letter, everything became completely different.