"Prying Information"
Many people wanted to be immortals, but the blood clan knew how hard it was to watch their loved ones die one by one.
Only pure-blooded blood clan members could be immortals, yet their number was also small, not even reaching 10.000.
The number was so small compared to an entire race, and even smaller when compared to other non-human races with a population reaching several million people.
So, the majority of the blood clan weren't immortals despite having a long lifespan.
These pure-blooded blood clan members had to watch their descendants, friends, and relatives, leaving them one by one.
From the start, the pure-blooded clan members suffered the most.
Although they could walk under the sunlight after evolving for thousands of years, they still had to drink blood once in a while.
They also couldn't walk too long under the sun, which was why their hidden kingdom was still underground.