Buried Upside Down by Uncle Jiu from the Start, I Grow Stronger with Every Breath

I transmigrated into a corpse that had just been buried in Renjia Town. I thought I was doomed, but then I awakened the "Get Stronger by Breathing" System. So I started taking deep breaths like crazy inside the coffin, only to find my cultivation advancing too fast...

On the first day, I burst out of the ground. On the second, I jumped higher than the trees. On the third, a lightning tribulation chased me down.

Uncle Jiu's face changed dramatically. "Quick, set up a formation! Something's wrong with this zombie. It seems to be... practicing the ninth set of broadcast calisthenics?"