Demon Venerable of the Blood Prison: Starting with Daily Intelligence

[Dark cultivation + cautious survival + daily intelligence + System + ruthless decisiveness + playing the pig to eat the tiger]

Chen Yuan, a burned-out office worker from Blue Star, was taken out by a speeding vehicle and transmigrated into the body of the lowest-ranking blood slave in the Blackwood Sect. Every day, he was drained of his life essence by demons. When his will to survive reached its limit, he awakened the [Daily Intelligence System] and began his path to defying fate...