Giant rat

Harvey Chase looked at the four Nine Yin Witch Cauldrons in front of him with a frown. The shapes are exactly the same, the only difference is the messy, scribble-like words on the cauldron. Harvey Chase touched them carefully with his hands. Although the four cauldrons looked like they were all made of cold bronze, they felt completely different to the touch. "ah--" A scream! It was Vianna's voice. Harvey Chase frowned and looked outside. Then, there was a loud bang, followed by the sound...