After Signing In For a Hundred Years, I Have Become the Big Brother of Vampires

"Mooyen had transmigrated into an otherworldly continent of swords and magic. All the clans were fighting one another and the entire wasteland was shrouded by countless demons and monsters.
Unfortunately, Unfortunately, he became a vampire. Even more unfortunate was that he became a member of the weakest and most inferior vampire family. And he was even a member of the last generation of that bloodline. But he unexpectedly awakened a sign-in system. All he had to do was to sign in, and he would gain amazing rewards: 　　
Sign in to the palace of the sacred kingdom, earn [Essence and blood of a bloodline at Count-level x1]
Sign in to the ancestral land of the bloodline, earn the talent of an immortal [Boundless Sea of Blood];
Sign in to the boudoir of the princess of the kingdom, earn the superpower [Skill of Mind-reading];...
Mooyen laid dormant for a hundred years and vowed that he would not leave the ancestral land of the bloodline until he became a god! 　
Until a hundred years later, on one fine day, Until one day, a hundred years later, the Orc army from the wasteland crossed the city gate of the human land and charged their way into the ancestral land of the bloodline! 　　
Seeing that the vampire race was about to face complete extermination, Mooyen's strength no longer allowed him to stay low..."