"Those at Rank 0 have a potential lifespan of 100 years." As Valyr began to read through the various values the book had given him on the maximum lifespans one could hope to achieve per rank, his eyes glistened with interest, committing every bit of information he got from the book to memory. "Ascending to Rank 1 increases this by 50%, giving those at Rank 1 a potential lifespan of 150 years."
"On the other hand, ascending to Rank 2 increases one's potential lifespan by another 50 years, which allows a Rank 2 class holder to live twice the maximum natural lifespan a Rank 0 class holder could achieve as long as they have a high VIT stat."
Though he was glad to find out that ascending to a higher class rank and achieving a high VIT stat was all he needed to obtain more than enough time to do the things he wanted to do in his current life, Valyr continued reading through the book, noticing that it also detailed the potential lifespans of those with class ranks higher than Rank 2.