Many ants can bite an elephant to death. Even if it doesn't take much Spiritual Power to kill one blood serpent, when you're up against thousands of them, a quasi-emperor's Spiritual Power could still be completely exhausted.
Faced with such a massive blood serpent horde, even a quasi-emperor would choose to evade rather than fight.
However, Chu Fengmian was an anomaly. As he watched more and more blood serpents rushing over, there wasn't the slightest tension on his face; instead, a few traces of a delighted smile appeared.
Each of these blood serpents represented a blood stone, and some of the more powerful ones had blood stones inside them that were even more refined than those found elsewhere.
