"Blood essence!!" Lu Zhen's eyes widened when he heard this.
Blood essence is a vital energy that flows through one's body. It is basically the vital energy contained within one's blood. Since blood essence contains one's vitality, which is their life force, even giving a drop of blood essence could make one's lifespan decrease by a little.
So, Lu Zhen was shocked when he heard that he needed to give his blood essence.
"What's the guarantee that it works?" Lu Zhen said with a sneer on his face.
"You must have felt the language, right? This contract is a special one that binds one with their blood, and if anyone breaks it, the breaker's lifespan will decrease by at least 50%..."
Lu Zhen frowned when he heard this. Actually, even if the lifespan of the person decreased, it wasn't a fully binding contract since the person would still be alive, and it didn't have much binding power either. But that wasn't the main problem.
