From the Start, I Sacrificed Six Billion. As an Immortal Emperor, I’m Unstoppable

Cultivation + spiritual qi revival + dual protagonists + invincible + guardian cultivator + one heroine Ling Yu was sleeping through class in high school as usual when he dreamed that divine beings from beyond the stars broke through space and tried to conquer Blue Star. He'd just reached the part where he transformed into an Immortal Emperor and single-handedly blocked the mighty alien invaders, leaving the world with nothing but his retreating silhouette. It was an unbelievably awesome moment. But to his surprise, the divine beings from beyond the stars really did descend! Just as he was about to run, the System awakened! System: Congratulations, Host, you've awakened the Invincible Immortal Emperor System! Sacrifice one billion people to reach the Great Vehicle stage! Sacrifice two billion people to reach the Tribulation Transcendence stage! Sacrifice six billion people to reach the Immortal Emperor Realm! Ling Yu: ??? Damn, isn't this System the villain?! System: Just tell me, do you want it or not? Ling Yu: Max it out! Sacrifice them! Sacrifice six billion for me! By the way, System, I've got a question. Will sacrificing only six billion affect the foundations of my Immortal Emperor cultivation? System: ????????? Raise Blue Star's overall fortune to certain benchmarks to receive divine arts, cultivation, spirit treasures, spirit weapons, and immortal artifacts! Congratulations, Host, you've reached the benchmark. Blue Star now has ten thousand Foundation Establishment cultivators and one hundred thousand Qi Refining cultivators. Reward: Kunpeng Divine Art... Congratulations, Host, you've reached the benchmark. Blue Star now has one hundred Golden Core cultivators, one hundred thousand Foundation Establishment cultivators, and one million Qi Refining cultivators. Reward: Qilin's Sacred Claw... Congratulations on achieving the milestone of universal immortality! Reward: the title of Immortal Realm Emperor! Ling Yu: What? I only get a title? Come on, System, get in my Ten Thousand Souls... I mean, Human Emperor Banner and take a seat!