Cultivating Immortality on a Deserted Island: I Get an Immortal-Grade Spiritual Root from the Start with the Lottery System

[No female lead + no holier-than-thou protagonist + no harem + comedy] The power of the Immortal Dao descended, and the waters around Blue Star expanded countless times over. The continents were shattered into countless deserted islands, and people were forced to fight the demon beasts that appeared in order to survive. In this perilous era, Li Xuan transmigrated into this world. Just as he stood there, completely bewildered, he awakened a god-tier lottery System. [Immortal-Grade Spiritual Root Advancement Scroll]: Instantly gain an immortal-grade lightning spiritual root. All the lightning in the world is mine to command! "Holy crap! I'm invincible from the start?!" Li Xuan hated it when other people cheated, but he hated being denied the chance to cheat even more. (The synopsis isn't doing it justice. Head to the main story.)