Zuo Feng stared intently at the potion cauldron in front of him, his entire focus was placed inside the cauldron, more precisely on the flame within.
At this time, the flames were not intertwined as before; they were separated into red and white colors. The temperature of the red flames was slightly lower than that of the white flames. Dozens of drops of crystal-clear potion floated up and down in the red flames, while the white flames were like a web, densely intertwined in the central part.
Zuo Feng's face was as calm as an ancient well, showing no signs of joy or anger, but one of his hands slowly withdrew, grabbing a medicinal herb beside him and throwing it into the cauldron.
