By slaying the Bloodbath Demon Wolves, you can collect their blood.

Gathering 300 portions of pure blood is enough to unlock the nightmare difficulty of the [Bloodbath Arena]!

In the Death Domain of the Thirty-Second World, Bloodbath Demon Wolves are everywhere, and with Zhang Yue's strength, hunting them is a breeze.

However, the tricky part is that for each demon wolf killed, you need to personally extract the blood from their corpses, which takes about 3 seconds, and the chance of obtaining pure blood is extremely low!