C711 Going up the Mountain

After running for more than ten meters, I turned my head and saw that the Old Giant was holding a heart. Between his hands, there was a ball of green and black Qi. The ball of Qi was getting denser and denser, and in the end, it wrapped around the heart. Clearly, the Old Giant had used that ball of Qi to protect the heart.

I became more and more curious about what the heart was