C1869 Heart Beat!

There seemed to be a rhythmic vibration, causing Yun Yan Ran to be stunned. The trembling of the pill furnace actually caused Yun Yan Ran to feel a dangerous aura for some reason!

"This?" Could it be that the pill furnace is going to explode? " Impressively, this thought also appeared in Yun Yan Ran's mind. Naturally, he could not help but take a few steps back